WFLY-3301 improve handling of java:comp/DefaultDataSource in persistece units (disables 2 phase bootstrap which currently doesn't work with java:comp:DefaultDataSource)
Merge pull request #6212 from scottmarlow/WFLY-3301_defaultds

WFLY-3301 improve handling of java:comp/DefaultDataSource in persistence units (disables 2 phase bootstrap which currently doesn't work with java:comp:DefaultDataSource)