Fixing timer marshalling problems (TimerManager)
Removing marshalling test framework and fixing tests (cherry picked from commit b7508925cfa97a92df5e0e9682e097cea7ef85da)
 - fixing compilation issue
Removing marshalling test framework from peristence.xml files
 - fixing failing test
BZ 999149 Making sure that throwing a WorkflowRuntimeException does not cause an NPE
BZ-1002586: initializing FormRenderContext with the ContentMarshallerContext again.
JBPM-3869, BZ-880874 - Pessimistic locking support
(cherry picked from commit 591683751a22e43150e2a73c58ac642054771c01)
JBPM-3869, BZ-880874 - Testing pessimistic locking (cherry picked from commit d640f032486b81b0cebb201bb42114b392f86371)