Mejora codigo smsgateway.

se añade llamado de parametro configuracion

src/BackendBundle/Controller/EnvioSmsController.php

@@ -2,6 +2,7 @@
 
 namespace BackendBundle\Controller;
 
+use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 use FOS\RestBundle\Controller\FOSRestController;
 use AppBundle\Lib\Utiles;
 use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;