Addition of mechanism to opt-out from catalog data during token validation

The additional query parameter: nocatalog in GET /v3/auth/tokens allows
the requestor to receive a token response omitting the catalog data.
This makes the token response sensibly smaller.

Token validation Catalog opt-out example:
GET /v3/auth/token?nocatalog

blueprint token-valid-catalog-opt-out

Change-Id: I722893ea7237530731f22f9cae643fa2adea5833
Merge "Addition of mechanism to opt-out from catalog data during token validation"