Add Availability Zone to Volume screens

User should be able to choose an AZ (or make unspecified) when creating a volume
AZ should be visible in Volumes table
AZ list should come from Cinder

Change-Id: I23314dedc3eb65454df32102b0a96174f8030d81
Closes-Bug: #1230288
Standardize display name on detail pages

* Standardized overview pages for volume, image and snapshot
as per the instance overview page.

Fixes bug #1207770

Change-Id: I7ae48542f4c8732c92dc4393dbaaea81158d34d6
Merge "Add Availability Zone to Volume screens"
Merge "Standardize display name on detail pages"