Description of problem:
I'm unable to build the latest sources following the instructions as described in
the quickstart.

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

How reproducible:
Consistent

Steps to Reproduce:
1. git clone git@github.com:droolsjbpm/droolsjbpm-build-bootstrap.git
2. droolsjbpm-build-bootstrap/script/git-clone-others.sh
3.droolsjbpm-build-bootstrap/script/mvn-all.sh clean install -DskipTests

Actual results:
[abaxter:~/Documents/Workspaces/kepler_201407_ee/bootstrap] ./droolsjbpm-build-bootstrap/script/mvn-all.sh clean install -DskipTests

===============================================================================
Repository: droolsjbpm-build-bootstrap
===============================================================================
[INFO] Scanning for projects...
[WARNING]
[WARNING] Some problems were encountered while building the effective model for org.jbpm:jbpm-bom:pom:6.2.0-SNAPSHOT
[WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.jbpm:jbpm-human-task-core:test-jar -> duplicate declaration of version ${jbpm.version} @ line 242, column 19
[WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.jbpm:jbpm-console-ng-human-tasks-admin-client:jar -> duplicate declaration of version ${jbpm.console.ng.version} @ line 456, column 19
[WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.jbpm:jbpm-console-ng-human-tasks-admin-api:jar -> duplicate declaration of version ${jbpm.console.ng.version} @ line 486, column 19
[WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.jbpm:jbpm-console-ng-human-tasks-admin-client:jar -> duplicate declaration of version ${jbpm.console.ng.version} @ line 491, column 19
[WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.jbpm:jbpm-console-ng-human-tasks-admin-backend:jar -> duplicate declaration of version ${jbpm.console.ng.version} @ line 496, column 19
[WARNING] 'dependencyManagement.dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: org.jbpm:jbpm-console-ng-generic-client:jar -> duplicate declaration of version ${jbpm.console.ng.version} @ line 517, column 19
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] KIE (Drools, jBPM, OptaPlanner) parent metadata
[INFO] KIE BOM (Bill Of Materials)
[INFO] Drools BOM (Bill Of Materials)
[INFO] OptaPlanner BOM (Bill Of Materials)
[INFO] jBPM BOM (Bill Of Materials)
[INFO] UberFire Extensions BOM (Bill Of Materials)
[INFO] Guvnor BOM (Bill Of Materials)
[INFO] Dashboard Builder BOM (Bill Of Materials)
[INFO] KIE (Drools, jBPM, OptaPlanner) parent with dependencies
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building KIE (Drools, jBPM, OptaPlanner) parent metadata 6.2.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: file:///home/abaxter/local/repositories/jboss-eap-6.1.1.GA/org/codehaus/mojo/buildnumber-maven-plugin/1.2/buildnumber-maven-plugin-1.2.pom
---------------------------------------------------
constituent[0]: file:/usr/share/maven/lib/maven-settings-builder.jar
constituent[1]: file:/usr/share/maven/lib/maven-embedder.jar
constituent[2]: file:/usr/share/maven/lib/jsr-305.jar
constituent[3]: file:/usr/share/maven/lib/maven-settings.jar
constituent[4]: file:/usr/share/maven/lib/plexus_utils.jar
constituent[5]: file:/usr/share/maven/lib/plexus_interpolation.jar
constituent[6]: file:/usr/share/maven/lib/maven-wagon_file.jar
constituent[7]: file:/usr/share/maven/lib/cdi-apicdi-api.jar
constituent[8]: file:/usr/share/maven/lib/commons-codec.jar
constituent[9]: file:/usr/share/maven/lib/plexus_plexus-cipher.jar
constituent[10]: file:/usr/share/maven/lib/maven-model-builder.jar
constituent[11]: file:/usr/share/maven/lib/commons-cli.jar
constituent[12]: file:/usr/share/maven/lib/aether_aether-transport-wagon.jar
constituent[13]: file:/usr/share/maven/lib/maven-model.jar
constituent[14]: file:/usr/share/maven/lib/aopalliance.jar
constituent[15]: file:/usr/share/maven/lib/aether_aether-connector-basic.jar
constituent[16]: file:/usr/share/maven/lib/slf4j_api.jar
constituent[17]: file:/usr/share/maven/lib/maven-wagon_http-shaded.jar
constituent[18]: file:/usr/share/maven/lib/aether_aether-util.jar
constituent[19]: file:/usr/share/maven/lib/org.eclipse.sisu.inject.jar
constituent[20]: file:/usr/share/maven/lib/commons-logging.jar
constituent[21]: file:/usr/share/maven/lib/plexus_containers-component-annotations.jar
constituent[22]: file:/usr/share/maven/lib/maven-repository-metadata.jar
constituent[23]: file:/usr/share/maven/lib/httpcomponents_httpclient.jar
constituent[24]: file:/usr/share/maven/lib/maven-artifact.jar
constituent[25]: file:/usr/share/maven/lib/maven-aether-provider.jar
constituent[26]: file:/usr/share/maven/lib/aether_aether-spi.jar
constituent[27]: file:/usr/share/maven/lib/plexus_plexus-sec-dispatcher.jar
constituent[28]: file:/usr/share/maven/lib/google-guice-no_aop.jar
constituent[29]: file:/usr/share/maven/lib/org.eclipse.sisu.plexus.jar
constituent[30]: file:/usr/share/maven/lib/atinject.jar
constituent[31]: file:/usr/share/maven/lib/maven-wagon_provider-api.jar
constituent[32]: file:/usr/share/maven/lib/aether_aether-impl.jar
constituent[33]: file:/usr/share/maven/lib/maven-compat.jar
constituent[34]: file:/usr/share/maven/lib/slf4j_simple.jar
constituent[35]: file:/usr/share/maven/lib/maven-core.jar
constituent[36]: file:/usr/share/maven/lib/guava.jar
constituent[37]: file:/usr/share/maven/lib/maven-plugin-api.jar
constituent[38]: file:/usr/share/maven/lib/geronimo-annotation.jar
constituent[39]: file:/usr/share/maven/lib/httpcomponents_httpcore.jar
constituent[40]: file:/usr/share/maven/lib/aether_aether-api.jar
constituent[41]: file:/usr/share/maven/lib/maven-wagon_http-shared4.jar
constituent[42]: file:/usr/share/maven/conf/logging/
---------------------------------------------------
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
at org.apache.maven.wagon.providers.file.FileWagon.resolveDestinationPath(FileWagon.java:206)
at org.apache.maven.wagon.providers.file.FileWagon.resourceExists(FileWagon.java:265)
at org.eclipse.aether.transport.wagon.WagonTransporter$PeekTaskRunner.run(WagonTransporter.java:518)
at org.eclipse.aether.transport.wagon.WagonTransporter.execute(WagonTransporter.java:427)
at org.eclipse.aether.transport.wagon.WagonTransporter.peek(WagonTransporter.java:398)
at org.eclipse.aether.connector.basic.BasicRepositoryConnector$PeekTaskRunner.runTask(BasicRepositoryConnector.java:363)
at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run(BasicRepositoryConnector.java:337)
at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:67)
at org.eclipse.aether.connector.basic.BasicRepositoryConnector$DirectExecutor.execute(BasicRepositoryConnector.java:649)
at org.eclipse.aether.connector.basic.BasicRepositoryConnector.get(BasicRepositoryConnector.java:247)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:536)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:437)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:262)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:239)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.loadPom(DefaultArtifactDescriptorReader.java:320)
at org.apache.maven.repository.internal.DefaultArtifactDescriptorReader.readArtifactDescriptor(DefaultArtifactDescriptorReader.java:217)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.readArtifactDescriptor(DefaultRepositorySystem.java:288)
at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:108)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getPluginDescriptor(DefaultMavenPluginManager.java:146)
at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getMojoDescriptor(DefaultMavenPluginManager.java:265)
at org.apache.maven.plugin.DefaultBuildPluginManager.getMojoDescriptor(DefaultBuildPluginManager.java:190)
at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.setupMojoExecution(DefaultLifecycleExecutionPlanCalculator.java:157)
at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.setupMojoExecutions(DefaultLifecycleExecutionPlanCalculator.java:144)
at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateExecutionPlan(DefaultLifecycleExecutionPlanCalculator.java:121)
at org.apache.maven.lifecycle.internal.DefaultLifecycleExecutionPlanCalculator.calculateExecutionPlan(DefaultLifecycleExecutionPlanCalculator.java:134)
at org.apache.maven.lifecycle.internal.BuilderCommon.resolveBuildPlan(BuilderCommon.java:92)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:317)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:555)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.StringUtils
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:235)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)
... 43 more

Expected results:
Project to build

Additional info: