124 update storage for repose

Neither Deuce or any storage drivers should save any user credentials or storage URL.

All requests provide token in the header x-auth-token and storage URL in the header x-storage-url, which should be filled up by Repose instead of the users.   Unittests reflect the requests behind (/after) Repose.  


@raxyu this prevents the driver from loading. We shouldn't be storing them as part of the driver instantiation; especially since they will be changing for potentially every call.