file:/// format isn't allow to import in business-central

Description of problem:
I spot the following error or changes when I did somketest for 6.3 DR2.
The business-central don't allow me import repository from local fomat, eg:
file:///home/rzhang/lab/1brms6/6.3.x/bpmsuite-6.3.0.DR2/jboss-brms-bpmsuite-6.3-quickstarts/jboss-bpmsuite-example

But this format is ok on previous release. Is this an intentional change or a potential bug?

17:07:53,040 ERROR [org.guvnor.structure.backend.repositories.RepositoryServiceImpl] (http-localhost.localdomain/127.0.0.1:8080-3) Error during create repository: java.lang.RuntimeException: Invalid remote: origin
at org.guvnor.structure.backend.repositories.git.GitRepositoryFactoryHelper.newRepository(GitRepositoryFactoryHelper.java:110) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.git.GitRepositoryFactoryHelper.newRepository(GitRepositoryFactoryHelper.java:77) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.git.GitRepositoryFactoryHelper$Proxy$$$_WeldClientProxy.newRepository(GitRepositoryFactoryHelper$Proxy$$$_WeldClientProxy.java) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.RepositoryFactoryImpl.newRepository(RepositoryFactoryImpl.java:61) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.RepositoryFactoryImpl$Proxy$$$_WeldClientProxy.newRepository(RepositoryFactoryImpl$Proxy$$$_WeldClientProxy.java) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.RepositoryServiceImpl.createRepository(RepositoryServiceImpl.java:225) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.RepositoryServiceImpl.createRepository(RepositoryServiceImpl.java:210) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.RepositoryServiceImpl.createRepository(RepositoryServiceImpl.java:168) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.RepositoryServiceImpl$Proxy$$$_WeldClientProxy.createRepository(RepositoryServiceImpl$Proxy$$$_WeldClientProxy.java) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_17]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_17]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_17]
at java.lang.reflect.Method.invoke(Method.java:601) [rt.jar:1.7.0_17]
at org.jboss.errai.bus.server.io.AbstractRPCMethodCallback.invokeMethodFromMessage(AbstractRPCMethodCallback.java:48) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at org.jboss.errai.bus.server.io.ValueReplyRPCEndpointCallback.callback(ValueReplyRPCEndpointCallback.java:22) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at org.jboss.errai.bus.server.io.RemoteServiceCallback.callback(RemoteServiceCallback.java:54) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at org.jboss.errai.cdi.server.CDIExtensionPoints$2.callback(CDIExtensionPoints.java:396) [errai-weld-integration-3.0.6.Final-redhat-1.jar:3.0.6.Final-redhat-1]
at org.jboss.errai.bus.server.DeliveryPlan.deliver(DeliveryPlan.java:47) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at org.jboss.errai.bus.server.ServerMessageBusImpl.sendGlobal(ServerMessageBusImpl.java:296) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at org.jboss.errai.bus.server.SimpleDispatcher.dispatchGlobal(SimpleDispatcher.java:46) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:97) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at org.jboss.errai.bus.server.service.ErraiServiceImpl.store(ErraiServiceImpl.java:114) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at org.jboss.errai.bus.server.servlet.DefaultBlockingServlet.doPost(DefaultBlockingServlet.java:142) [errai-bus-3.2.2.Final-redhat-1.jar:3.2.2.Final-redhat-1]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-2.jar:1.0.2.Final-redhat-2]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-2.jar:1.0.2.Final-redhat-2]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.uberfire.ext.security.server.SecureHeadersFilter.doFilter(SecureHeadersFilter.java:69) [uberfire-servlet-security-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.uberfire.ext.security.server.SecurityIntegrationFilter.doFilter(SecurityIntegrationFilter.java:61) [uberfire-servlet-security-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:231) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:512) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.5.6.Final-redhat-2.jar:7.5.6.Final-redhat-2]
at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.5.6.Final-redhat-2.jar:7.5.6.Final-redhat-2]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.5.6.Final-redhat-2.jar:7.5.6.Final-redhat-2]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:150) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:854) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:926) [jbossweb-7.5.12.Final-redhat-1.jar:7.5.12.Final-redhat-1]
at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_17]
Caused by: java.lang.RuntimeException: org.eclipse.jgit.api.errors.InvalidRemoteException: Invalid remote: origin
at org.uberfire.java.nio.fs.jgit.util.JGitUtil.cloneRepository(JGitUtil.java:250) [uberfire-nio2-jgit-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
at org.uberfire.java.nio.fs.jgit.JGitFileSystemProvider.newFileSystem(JGitFileSystemProvider.java:643) [uberfire-nio2-jgit-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
at org.uberfire.java.nio.file.FileSystems.newFileSystem(FileSystems.java:117) [uberfire-nio2-api-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
at org.uberfire.java.nio.file.FileSystems.newFileSystem(FileSystems.java:83) [uberfire-nio2-api-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
at org.uberfire.io.impl.AbstractIOService.newFileSystem(AbstractIOService.java:244) [uberfire-io-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
at org.uberfire.ext.metadata.io.IOServiceIndexedImpl.newFileSystem(IOServiceIndexedImpl.java:198) [uberfire-metadata-commons-io-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
at org.guvnor.structure.backend.repositories.git.GitRepositoryFactoryHelper.newRepository(GitRepositoryFactoryHelper.java:102) [guvnor-structure-backend-6.4.0.Beta2-redhat-1.jar:6.4.0.Beta2-redhat-1]
... 46 more
Caused by: org.eclipse.jgit.api.errors.InvalidRemoteException: Invalid remote: origin
at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:136) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.eclipse.jgit.api.CloneCommand.fetch(CloneCommand.java:193) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.eclipse.jgit.api.CloneCommand.call(CloneCommand.java:133) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.uberfire.java.nio.fs.jgit.util.JGitUtil.cloneRepository(JGitUtil.java:229) [uberfire-nio2-jgit-0.8.0.Beta2-redhat-1.jar:0.8.0.Beta2-redhat-1]
... 52 more
Caused by: org.eclipse.jgit.errors.NoRemoteRepositoryException: file:///home/rzhang/lab/1brms6/6.3.x/bpmsuite-6.3.0.DR2/jboss-brms-bpmsuite-6.3-quickstarts/jboss-bpmsuite-example: not found.
at org.eclipse.jgit.transport.TransportLocal$1.open(TransportLocal.java:131) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.eclipse.jgit.transport.TransportBundleFile$1.open(TransportBundleFile.java:106) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.eclipse.jgit.transport.Transport.open(Transport.java:561) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.eclipse.jgit.transport.Transport.open(Transport.java:438) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.eclipse.jgit.transport.Transport.open(Transport.java:319) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.eclipse.jgit.transport.Transport.open(Transport.java:288) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:120) [org.eclipse.jgit-3.7.1.201504261725-r.jar:3.7.1.201504261725-r]
... 55 more

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Start business-central based on EAP 6.4.6
2. Clone repository from business-central ui (repositoryEditor UI)
3. Input format like file:///your local repos path
4. An popup windows shows "java.lang.RuntimeException: java.lang.RuntimeException: Invalid remote: origin" and error would appear in the server.log too.

Actual results:

Expected results:

Additional info: