Hang with FireUntilHalt and updateToVersion

While fireUntilHalt is running in a thread and processing RHS (e.g. RHS is slow), if you call KieContainer.updateToVersion(), the updateToVersion thread will hang. This is reproducible not only in Windows.

Created unit test PR : https://github.com/kiegroup/drools/pull/3655

Sequence of what's happening:

Note: [Thread-0] is the thread to run fireUntilHalt(). [Time-limited test] is the main test thread so calls updateToVersion().

~~~
[Thread-0] calls fireUntilHalt(). state INACTIVE -> FIRING_UNTIL_HALT
[Thread-0] matches the rule and fires RHS. But taking some time. In this test, Thread.sleep(200).
[Time-limited test] calls updateToVersion().
[Time-limited test] -> KnowledgeBaseImpl.tryLockAndDeactivate() -> KnowledgeBaseImpl.tryDeactivateAllSessions() -> DefaultAgenda$ConcurrentExecutionStateMachine.tryDeactivate() -> pauseFiringUntilHalt(). currentState == ExecutionState.FIRING_UNTIL_HALT so wasFiringUntilHalt is set to 'true'. state FIRING_UNTIL_HALT -> HALTING
[Thread-0] exits consequence.evaluate()
[Thread-0] calls DefaultAgenda$ConcurrentExecutionStateMachine.immediateHalt(). state HALTING -> INACTIVE
[Time-limited test] -> DefaultAgenda$ConcurrentExecutionStateMachine.tryDeactivate(). state INACTIVE -> DEACTIVATED
[Time-limited test] -> KieBaseUpdaterImpl.run() so actual update is processed
[Time-limited test] -> KnowledgeBaseImpl.unlockAndActivate() -> KnowledgeBaseImpl.activateAllSessions() -> DefaultAgenda$ConcurrentExecutionStateMachine.activate() -> DefaultAgenda$ConcurrentExecutionStateMachine.immediateHalt(). state DEACTIVATED -> INACTIVE
[Time-limited test] in DefaultAgenda$ConcurrentExecutionStateMachine.activate(), wasFiringUntilHalt is true. So agenda.fireUntilHalt() is called. https://github.com/kiegroup/drools/blob/master/drools-core/src/main/java/org/drools/core/common/DefaultAgenda.java#L1334-L1337
[Time-limited test] DefaultAgenda.fireUntilHalt(). state INACTIVE -> FIRING_UNTIL_HALT
[Time-limited test] -> This thread fires the rule that was add by this update.
[Time-limited test] -> calls DefaultAgenda$RestHandler$FireUntilHaltRestHandler.handleRest()
[Time-limited test] -> Waits at agenda.propagationList.waitOnRest(); but never be notified
~~~

I guess we don't want to let [Time-limited test] run fireUntilHalt() but how to prevent?