RHBPMS-4543 - Error during async work item handler complete may wrongly lead a sucessful command to be executed twice

RHBPMS-4622 - LogCleanupCommand executor command should not clean up variableinstancelog and nodeinstancelog for active processes in BPM Suite 6

JBPM-5692 - Addition of sub process ID to /nodes endpoint for SubProcessNode, JBPM-5703 - CaseStageInstace doesn't return any active nodes (#750)

* changed DefaultSignalManager for concurrency
* Fix memory leak in processEventListeners

JBPM-5667 - Second stage of a Case verifies its completion condition with old value of case file property

JBPM-4646 - Case management - added support for taking completed nodes for case instance, improved filtering for case nodes to exclude less meaningful nodes

problem on startup

JBPM-4646 - Case management - futher improvements for queries and case id generator to make it pluggable in kie server

Weld 2.4.1.Final behaves somewhat different and is initializing the beans
during discovery. That leads to a call
CustomTaskPersistenceContextManager#beginCommandScopedEntityManager
which throws the exception. The bean is thus not initialized and the CDI
container is not able to inject some members (as they were not
initialized and thus are not available for injection). Using the
CommandBasedTaskService mock should lead to a same result - we do assert
that the custom bean is being injected as the execute() methods throws
exception.

JBPM-5607 - Using ejb3 timer-service backed by database in EAP 7 not working with kie-server application (#732)

* ExcludedOwners can no longer execute operations on tasks (unless they are also a Business Administrator of the task).

* Added license header to MVELLifeCycleManagerTest.

* JavaDoc of the second unit test was incorrect.