Complete volume attachment until volume become to 'in-use'

1. Move the wait volume state logic from nova to cinder
2. Wait volume state to be "in-use", then complete volume attachment
3. Change volume sync code to not sync "attaching" or "detaching" state
as if sync code change such state, then volume attach/detach will be
broken



Closes-Bug: #1402467
Change-Id: I3640afe9ad4aba8788a932d05e94f55a3b8d6333