Merge pull request #2644 from getsentry/gh-2643

Fix compatibility with older djangorestframework

Author: mattrobenolt

src/sentry/api/client.py

@@ -44,7 +44,7 @@ def request(self, method, path, user=None, auth=None, params=None, data=None,
             data = json.loads(json.dumps(data))
 
         rf = APIRequestFactory()
-        mock_request = getattr(rf, method.lower())(full_path, data)
+        mock_request = getattr(rf, method.lower())(full_path, data or {})
 
         if request:
             mock_request.auth = getattr(request, 'auth', None)