Update parameters like Fork

See sumocoders/Framework#191

Author: Jonas De Keukelaere

Controller/TutorialController.php

@@ -143,7 +143,7 @@ public function sendMailAction(Request $request)
 
             // set some extra properties, just like you would do with a normal \Swift_Message
             $message->setTo(
-                $this->getParameter('mailer_default_to_email')
+                $this->getParameter('mailer.default_to_email')
             );
 
             // send it