Updated openstack/openstack
Project: openstack/nova  74415918b9e7caf4610d2bc1ec0e37f20bb5f3c0

Load extension 2 times fix load sequence issue

Some extensions such as volumes need to inherit servers, however
the extension load sequence can't be guaranted. If the servers
extension is loaded after volumes, the controller of volumes will
be None and lead to problem.

Change-Id: Iec1e759f5c1f570a6b0ac65fb357b4f15102499c
Closes-Bug: #1373238