Replace static v2 Image model with warlock model

* Add warlock v0.1.0 as a dependency
* Generate a pythonic, self-validating Image model using warlock
* Add raw method to Schema model
* Related to bp glance-client-v2

Change-Id: Ib98e912a7af0bb570b4fd738733edd9b837d1a04

glanceclient/v2/client.py

@@ -15,6 +15,8 @@
 
 import logging
 
+import warlock
+
 from glanceclient.common import http
 from glanceclient.v2 import images
 from glanceclient.v2 import schemas
@@ -36,5 +38,10 @@ class Client(object):
     def __init__(self, endpoint, token=None, timeout=600, **kwargs):
         self.http_client = http.HTTPClient(
                 endpoint, token=token, timeout=timeout)
-        self.images = images.Controller(self.http_client)
         self.schemas = schemas.Controller(self.http_client)
+        self.images = images.Controller(self.http_client,
+                                        self._get_image_model())
+
+    def _get_image_model(self):
+        schema = self.schemas.get('image')
+        return warlock.model_factory(schema.raw())