MODE-1832: ModeShape CMIS component has bug in JcrService

Removes incorrect call to name(String).

https://issues.jboss.org/browse/MODE-1832
MODE-1832: ModeShape CMIS component has bug in JcrService

Per irc conversation with Oleg, if repositoryId is short form (e.g. "repositoryName", rather than "repositoryName:workspace"),
then workspace(String) should return null. This allows login to use the default workspace.

Adds jetty-maven-plugin to run ModeShapeCmisClientTest.

https://issues.jboss.org/browse/MODE-1832
Drops jetty-maven-plugin since we already have cargo.