Setting default format in RestRouteCollection.php only if not set already

This change allows annotations set default format which won't be overriden in RestRouteLoader::load()

Author: Wirone

Routing/RestRouteCollection.php

@@ -62,7 +62,10 @@ public function prependRouteControllersWithPrefix($prefix)
     public function setDefaultFormat($format)
     {
         foreach (parent::all() as $route) {
-            $route->setDefault('_format', $format);
+            // Set default format only if not set already (could be defined in annotation)
+            if(!$route->getDefault('_format')) {
+                $route->setDefault('_format', $format);
+            }
         }
     }