BZ-1074483 - Web service task with ASYNC mode fails with javax.persistence.TransactionRequiredException

(cherry picked from commit 4cac63f044346187e2f8527fffddf9ac411036c8)
BZ-1071144 - BPMS cluster with deployment unit using PER_PROCESS_INSTANCE session strategy throws java.lang.IllegalStateException

(cherry picked from commit 478b403f770de330b1ca12ecc21963e6aa1dac95)
BZ-1072463 - Events are not signalled to process - added validation to early warn user that intermediate events must have incoming connection

(cherry picked from commit 36d427fef0917b6d9e30ae83213f6533016afb9c)
BZ-1071000 - JBPM, Exclusive Gateway cannot evaluate constraint containing 'bpmn2:getVariable(..)', IBM JVM

(cherry picked from commit 66610be157a07b3aa34f0b579490ac829c6cc9a1)
BZ-1076036 - Reassignment of task did not happen after fail-over because of NPE in global timer service
BZ-1065314 - Unable to retrieve a JSON formatted Task instance via the REST API
BZ-1065314 - Unable to retrieve a JSON formatted Task instance via the REST API
BZ-1070324 - Build problems not reported in the 'Problems' panel.

(cherry picked from commit 500888c736826aabbd780988df9eb98f7601b4db)