Steven Dake bdfcd74cf2 Turn off oslo_conccurrency locking in volume driver
Since the volume driver is only accessed through one process, we
probably don't need concurrency locking.

Change-Id: I50f0cb4a7ef92a5fefe5fafb9f3ddadf0bf796b0
Closes-Bug: #1473535
2015-07-13 19:27:46 -07:00
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