Fixed post and put templates for Symfony3 compatibility

* Fixed post and put templates for Symfony3 compatibility

* post and put templated fixed for symfony3 and php<5.5 compatibility

Author: ilario-pierbattista

src/Voryx/RESTGeneratorBundle/Resources/skeleton/rest/actions/post.php.twig

@@ -19,7 +19,7 @@
     {
 {% block method_body %}
         $entity = new {{ entity }}();
-        $form = $this->createForm(new {{ entity }}Type(), $entity, array("method" => $request->getMethod()));
+        $form = $this->createForm(get_class(new {{ entity }}Type()), $entity, array("method" => $request->getMethod()));
         $this->removeExtraFields($request, $form);
         $form->handleRequest($request);
 

src/Voryx/RESTGeneratorBundle/Resources/skeleton/rest/actions/put.php.twig

@@ -21,7 +21,7 @@
         try {
             $em = $this->getDoctrine()->getManager();
             $request->setMethod('PATCH'); //Treat all PUTs as PATCH
-            $form = $this->createForm(new {{ entity }}Type(), $entity, array("method" => $request->getMethod()));
+            $form = $this->createForm(get_class(new {{ entity }}Type()), $entity, array("method" => $request->getMethod()));
             $this->removeExtraFields($request, $form);
             $form->handleRequest($request);
             if ($form->isValid()) {