Update ResettingController.php

http://symfony.com/doc/current/cookbook/form/direct_submit.html

"The handleRequest() method was introduced in Symfony 2.3."
"Before Symfony 2.3, the submit() method was known as bind()."

"Passing the Request directly to submit() still works, but is deprecated and will be removed in Symfony 3.0. You should use the method handleRequest() instead."