Updated openstack/openstack
Project: openstack/nova  5a1c330f5cf719a42c87237d61500e75ce7fc9b9

Fix api direct use of instance module objects

This switches the nova/api and nova/tests/api code to use
nova.objects.Instance* vs nova.objects.instance.Instance*.

Partial-Blueprint: object-subclassing

Change-Id: I146f1d082fa37e1a5c09aa8c5363746daffbc219