Add request method and url to response log

At the moment we can't relate the response to a request.

backdrop/core/log_handler.py

@@ -40,6 +40,6 @@ def log_request():
 
 def create_response_logger(app):
     def log_response(response):
-        app.logger.info("response: %s" % response.status)
+        app.logger.info("response: %s - %s - %s" % (request.method, request.url, response.status))
         return response
     return log_response