Change labels in QOS Specs panels

Under Admin->Volumes->Volume Types, all the QOS spec
forms and tables should match the Cinder docs, which
use "QoS", instead of "QOS".

Also, references to QoS "consumer" should be
capitalized.

Change-Id: I70237152732f02c4c2c6c34917181a5dcb669b12
Closes-Bug: #1371711
Merge "Change labels in QOS Specs panels"