Updated openstack/openstack
Project: openstack/cinder  8a67386c240e724e775c723557882780bf7d24fb

Fix begin_detach logic

Fix begin_detach logic so it checks that a volume is in-use AND
attached.

Change-Id: I6f0e584070a5fc02c55c26ea92cb8b0c2a2cda3e
Closes-Bug: #1337088