Add VM Migrator to VM placement engine
Add VM Migrator to VM placement engine

Change-Id: I36e300db07dc87d4b9d0569c6bc48d7d3d206193

ekcs/congress,ramineni/my_congress,ekcs/congress,openstack/congress,ekcs/congress,ramineni/my_congress,ramineni/my_congress,ekcs/congress,ramineni/my_congress,openstack/congress