Volume Types tab with QOS Specs

This feature adds a new "Volume Types" tab to the Admin-Volumes panel, and
places QOS Specs on the panel. Future check-ins will add further
QOS Spec functionality, such as adding and deleting, etc.

Partially Implements: blueprint cinder-qos-specs
Closes-Bug: 1284506
Change-Id: I497f3bd00bb13356f5d0734f465cbf6feb02f781
Merge "Volume Types tab with QOS Specs"