The api client queries keystone to obtain the freezer api endpoint,
provided that the freezer api service and endpoint have been registered in
keystone.
An optional parameter to specify the api endpoint is supported
Change-Id: I6626a60d1fd5d18a59376165e94c789832865ae0
Implements: blueprint freezer-apiclient-endpoint
First implementation of the freezer API.
Slightly more than a skeleton with basic functionality
Change-Id: Iae04affea3aa0f4a943599b528df49d9d4a5b845
Implements: blueprint freezer-api-first-rel