Updated openstack/openstack
Project: openstack/nova  cdd38ed3348874046f468b5d954b945e25010452

Remove cell api overrides for lock and unlock

This isn't actually needed as these methods handle objects and is
triggered when the instance object is saved.
It actually caused a race condition with unlock as it triggers 2
instance updates from a compute cell.

Change-Id: I42eea6a2984f70527d4fc37f48ad973a2248721c
Closes-Bug: #1257168