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

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

Catalog opt-out example:
POST /v3/auth/token?nocatalog

blueprint catalog-optional

Change-Id: I5d41dea842c830f1f9b03cba2b56ebdcc35faa50