LPS-51058 Appy cluster master executor to cluster scheduler.
LPS-51058 Remove SchedulerEngineClusterManager, no more need it.
LPS-51058 Fix unit test, make it 100% covered.
LPS-51058 Cleanup MockSchedulerEngine to not declare unthrowing exceptions
LPS-51058 Those fields should not be static
LPS-51058 Just directly load the class, no need to scan its enclosing class.
LPS-51058 Source formatting
LPS-51058 Be specific to help AspectJ matching pointcut faster
LPS-51058 Source formatting
LPS-51194 Don't ignore cluster tests which are pretty important, if anything break we shall fix it, not ignoring it.
LPS-51058 SF