NIFI-12203: Ensure that when inheriting cluster flow on startup, we r…

[markap14]

…emove any Controller Services, Reporting Tasks, Parameter Contexts, etc. that are not in the proposed flow. Also removed overly aggressive timeout from RunOnceIT and performed minor code cleanup

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NIFI-00000

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[exceptionfactory]

Thanks for correcting this issue and updating the system test @markap14, the changes to synchronize controller-level components look good. I rebased to resolve a formatting difference with one method in VersionedFlowSynchronizer. +1 merging