Queue optimalization
Merge branch 'RELEASE-2.1' of https://github.com/bluesoft-rnd/aperte-workflow-core into RELEASE-2.1

Conflicts:
	core/webapi/src/main/java/org/aperteworkflow/webapi/main/queues/controller/QueuesController.java
Merge branch 'RELEASE-2.1' of https://github.com/bluesoft-rnd/aperte-workflow-core into RELEASE-2.1
Jbpm thread safety
Merge branch 'RELEASE-2.1' of https://github.com/bluesoft-rnd/aperte-workflow-core into RELEASE-2.1

Conflicts:
	core/jbpm-context/src/main/java/pl/net/bluesoft/rnd/pt/ext/jbpm/ProcessToolJbpmSession.java