BF: initialize identity variable

closes #19

base.py

@@ -24,6 +24,7 @@ class RequestHandler(webapp2.RequestHandler):
         self.uid = None
         self.source_site = None
         self.drone_request = False
+        identity = {}
         access_token = self.request.headers.get('Authorization', None)
         if access_token and self.app.config['oauth2_id_endpoint']:
             token_request_time = datetime.datetime.now()