MODE-1915 - Updated ModeShape's EAP kit to 6.1.0.Beta

To validate this PR, please make sure JBoss EAP Beta is installed locally in your Maven repo, via the `bin/install-eap.sh` script.

Also, if the `settings.xml` file provided with the project is not used, make sure the Maven repository is updated in your local `settings.xml`

Even though the published Maven repository is incomplete, the only artifact(s) that seem to be missing are transitive test artifacts (which we use to validate/test our subsystem). Therefore, a workaround was added in which we depend upon another version of the missing test artifact.