Merge pull request #1610 from jbertram/2.4.x

HORNETQ-1338 - All methods in ClientSessionImpl which implement XAResour...
HORNETQ-1337 - Policy Fail may drop messages before it sends the exception to the client

Conflicts:

	hornetq-server/src/main/java/org/hornetq/core/postoffice/impl/PostOfficeImpl.java