CLOUDSTACK-8079: If the cluster capacity threshold is reached, HA-enabled VM is not migrated on another host during HA

Changes:
-  When there is HA we try to redeploy the affected vm using regular planners and if that fails we retry using the special planner for HA (which skips checking disable threshold)
Now because of job framework the InsufficientCapacittyException gets masked and the special planners are not called. Job framework needs to be fixed to rethrow the correct exception.
- Also the VM Work Job framework is  not setting the DeploymentPlanner to the VmWorkJob.  So the HA Planner being passed by HAMgr was not getting used.
- Now the job framework sets the planner passed in by any caller of the VM Start operation, to the job
CLOUDSTACK-8078: [Automation] Deletion of Affinity Groups - CloudRuntimeException: No Event Pubish can be wrapped within DB Transaction!

Changes:
-     The event of deleteing an affinity group is published on the MessageBus so that IAM Service can listen and process the event, However the publish operation should not be handled within a DB transaction, since it may take longer and hold the DB transaction for long unnecessarily
-    Publish any events to MessageBus outside of the transaction

Conflicts:
	server/src/org/apache/cloudstack/affinity/AffinityGroupServiceImpl.java
CLOUDSTACK-8022: [Automation] Deletion of Domain with Cleanup set to "true" fails

Changes:

-  This is a race condition between the deleteDomain thread and AccountChecker thread. DeleteDomain thread marks the domain as inactive and proceeds for cleanup, AccountChecker thread that runs at the same time cleans up any domains marked as inactive.
-  When the DeleteDomain thread finds that domain is already removed, it need not error out since the domain deletion has already happened