Glance v1 API Cleanup

The intent of this PR is to clean up the OpenStack Glance v1 API. The annotations for the API have been simplified, and there is now only a single base expect test.

- Mock tests will come in the v2 API.
- Live tests against the Rackspace Cloud fail due to version negotiation with v2 (no API yet!)
- Endpoint version negotiation `ZoneToEndpointNegotiateVersion` may need to be reverted to use `ZoneToEndpoint`.