Stop looking for v2 image in container

The v2 API no longer returns images in JSON containers like
'{"image": {...}}', so stop trying to decode the responses
as if it does.

Fix bug 1031185

Change-Id: I5209fe76445d4195b12944146a0ef190883f363f

glanceclient/v2/images.py

@@ -52,5 +52,5 @@ class Controller(object):
         resp, body = self.http_client.json_request('GET', url)
         #NOTE(bcwaldon): remove 'self' for now until we have an elegant
         # way to pass it into the model constructor without conflict
-        body['image'].pop('self', None)
-        return self.model(**body['image'])
+        body.pop('self', None)
+        return self.model(**body)