Error state recording in ClusteredMCMPHandler can cause unnecessary reset requests

Change List<Boolean> to a AtomicReference<ResetState>, where ResetState is:
enum ResetState

Reset is necessary if state == ResetState.REQUIRED

Recording the initiation of a reset set the state to ResetState.PENDING
Recording the completion of a reset changes the state to NONE, only if the state is still ResetState.PENDING