Support JBoss 6.x and 7.x [JENKINS-19256]

Adding support is quite trivial... there are no existing tests and it's essentially copy & paste. Maybe a more DRY solution would be nice, but that's a different issue.

I've opened a corresponding issue in JIRA:

https://issues.jenkins-ci.org/browse/JENKINS-19256

And BTW: Is there a planned date to release 1.10?