Update V2 API to return detailed volume information on create

Current implementation returns only summary information, so
cinderclient requires additional GET call to get details.
Updated the api to return the details by default so the GET in
cinderclient can be removed.

Closes-Bug: #1265893

Change-Id: I56d4d79c4a942d8bf53318e46737674dc0bf9b56
Merge "Update V2 API to return detailed volume information on create"