Updated openstack/openstack
Project: openstack/sahara  152c42e6fdad41b488f713098e54dbfde529b1b3

Fix detaching cinder volumes

Detach method in volume object clears only attachment metadata info.
Necessary to use delete_server_volume in novaclient for detachment
volume.

Fixes bug: 1317459

Change-Id: I48223606ac89cd46fd19967f69510a0550d69023