Sync oslo modules

Synchronize oslo modules, removing unsed gettextutils and fixing tests
for policy module change.

Change-Id: I2fbb3668522eabea9a6408ccd2f3c3d76645e2ee
Get correct server_id when udpate Volume Attachment

Get the correct server id used for dettach the volume when
updating CinderVolumeAttachment.

Fixed bug #1402500

Change-Id: I3eeb24e6eab8335475d6a76d80a461765089c9c0
Merge "Get correct server_id when udpate Volume Attachment"
Merge "Sync oslo modules"