Updated openstack/openstack
Project: openstack/nova  b1bf50d9d3f873a65d7cd70c4c9f0c48af9920a6

Remove warn log for over quota

Over quota exception is already raised at API layer
and no need to print a warning log.

Change-Id: If44d5f2dd0e11d15d57cf6ab247f5e9e7fe75a9c