Description of problem:
Using Uberfire's Git VFS, I'm unable to push to a FileSystem created as
FileSystem clonedInsuranceFS = ioService.newFileSystem( URI.create( TEST_CLONED_REPOSITORY ), new HashMap<String, Object>() {{
put( "origin", "git://localhost:9418/insurance" );
put( "username", "brmsAdmin" );
put( "password", "brms_1234" );
}} );

The Server hosting the insurance repository is Business Central 6.0.1 CR2.

I'm pushing with the following code:
ioService.getFileSystem( URI.create( TEST_CLONED_REPOSITORY + "?push=git://localhost:9418/insurance&force" ) );

The exception is:
org.eclipse.jgit.api.errors.TransportException: git://localhost:9418/insurance: push not permitted

Tracing the problem back, I see that JGitUtil.pushRepository's credentialsProvider has the username "guest" and password "". This is likely the problem.

Version-Release number of selected component (if applicable):
Uberfire 0.3.1

How reproducible:
Consistent

Steps to Reproduce:
1. Business Central hosts git
2. Try to push a change
3. Push fails silently

Actual results:
Push fails silently

Expected results:
Push succeeds

Additional info: