Add QoS extension to Cinder

Partial-Bug: #1202767

Change-Id: Icfe1e644ad9fa443ed493a8d0039b53322c9cebf
author: diane fleming
Fix typos, remove duplicate words

Change-Id: Iac4b05dc3161f2c022e193f8435630b711da8dc3
Merge "Fix typos, remove duplicate words"
Merge "Add QoS extension to Cinder"