Create a job for PR on jbosstm/jboss-as

This will allow us to test changes to our AS fork before merging. I suggest we run all the tests that AS run on lightning, followed by all the Narayana tests.

We should also come up with a plan for building PR on 4_BRANCH or 5_BRANCH and Narayana together. This is required for situations when we need to make commits to both code basis that are mutually dependent.