Add more steps to stop an engine

Add elements to audit run queue only if engine is enabled.
Use engine state as the conditional for running serializer, audits.
On stopping the engine, clear the current run queue.

Work on blueprint kill-repair-scripts

Change-Id: Iba8c94caec9e75f4b6fda8d4bd0bf07b25e596f8
Merge "Add more steps to stop an engine"