BZ-1167738 - BitronixRollbackException thrown instead of performing rollback

(cherry picked from commit 22765a451224723931ad8b1e2bb77d03fe4733bd)
BZ-1165807 - Mapping Escalation events from/to process variables doesn't work

(cherry picked from commit 660d8d99e4ef1c8de249fc77dc4df995484c23c0)