Updated openstack/openstack
Project: openstack/nova  023e6c9d65349dc2e53ea2e84ce55e61df941c6a
null
Fix bug detach volume fails with "KeyError" in EC2

Modified volume['instance_uuid'] to volume.get('instance_uuid'),
to avoid "KeyError", when detach a volume with "attaching" status.

Change-Id: Ic1aacab212c2a2026d18ef57ad9d77fdc6d86b47
Closes-Bug: #1280532