BZ-1067772,BZ-1071879 - Group task permissions not available through remote JMS clients (cherry picked from commit 93ae4d97c9d35f88ad9857213c30bc622e6a2951)

Conflicts:
	jbpm-human-task/jbpm-human-task-core/src/main/java/org/jbpm/services/task/utils/CollectionUtils.java