Fix more missing variables

This particular example based on get it started doc described in http://payum.org/doc/0.9/Core/get-it-started. 

It first line you can see `include 'config.php';`. Could you use token factory\storage and the rest as they defined in `config.php`(see get-it-started link above). 

It is not your fault, so you can reject this, it is ok. but while you on it you can fix it