BZ-1060747 - Deployment of Business-central to WebSphere app server 8.5 fails - fixed executor shutdown procedure in cdi

(cherry picked from commit 4aff9db532457642f7c3c0fe30d944938217225a)
BZ-1036647 - Improve RuntimeManager for Spring usage
JBPM-4125 - Support for Human Task Spring Transactions in RuntimeManager

(cherry picked from commit 245e72263d9a5997c2f7a69fc8d71f9afab08e7b)

Conflicts:
	jbpm-human-task/jbpm-human-task-core/src/main/java/org/jbpm/services/task/HumanTaskConfigurator.java
	jbpm-runtime-manager/src/main/java/org/jbpm/runtime/manager/impl/PerProcessInstanceRuntimeManager.java
BZ-1036647 - Improve RuntimeManager for Spring usage - disabling local transaction as it causes failures for spring