fix containeraware stuff

Author: Jason Miesionczek

Controller/JsonRpcController.php

@@ -5,7 +5,8 @@
 use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\DependencyInjection\ContainerAware;
+use Symfony\Component\DependencyInjection\ContainerAwareInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareTrait;
 
 /**
  * Controller for executing JSON-RPC 2.0 requests
@@ -41,8 +42,10 @@
  * @author Christoph Singer
  *
  */
-class JsonRpcController extends ContainerAware
+class JsonRpcController implements ContainerAwareInterface
 {
+    use ContainerAwareTrait;
+    
     const PARSE_ERROR = -32700;
     const INVALID_REQUEST = -32600;
     const METHOD_NOT_FOUND = -32601;