Updated openstack/openstack
Project: openstack/nova  cf4daba3cfd72341c6c067fabb9de9291859329a

Enable live migration unit test use instance object

test_post_live_migration_no_shared_storage_working_correctly is
still using instance dict, we should change it to using instance
object.

Related to blueprint compute-manager-objects-juno

Change-Id: I7709b32ebeef88eb9759d0275c3076091b6be669