Updated openstack/openstack
Project: openstack/cinder  e128cffb9c5f4b8e76491664204db2b548307cf4
null
Add attach/detach notifications

Add the following notifications:
  - attach.start
  - attach.end
  - detach.start
  - detach.end

Blueprint: attachment-notifications
Change-Id: I4a4b123468c139bc2bcd948a1e7438c3830b5e42