Updated openstack/openstack
Project: openstack/cinder  7c34f3aec0e713b8c3b97bd27a0c5e0f6aa6b277
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Append nas_opts to IBMNAS_NFSDriver configuration

'nas_opts' were added in the NFS Driver (nfs.py), but were not appended
to the IBMNAS driver configuration, causing failure with the multi-backend
configuration of driver.

Adding the missing configuration.

Change-Id: I55727566d03573908750d01ae1345c4b6276f131
Closes-Bug: #1298279
(cherry picked from commit adb43dab7072a7e452710ac5db346e9a2c99993f)