Imported Translations from Transifex

Change-Id: I39ef28abfa51c6f41eace1b116b5d444d0c04207
Update to the latest oslo loopingcall.

This renames a class from loopingcall.LoopingCall to
loopingcall.FixedIntervalLoopingCall.

Change-Id: If51d3f4cc2a393f730cd168b16d444725151dbf4
Improve the deprecated message about DEFAULT.root_helper

bug #1166706

Change-Id: Ic90fefefc0c3339cbc876e4402b6d6c5aa841c47