Continue work on ACL rewritting

* fix center resolver dispatcher
* add scope resolver
* tests for authorization helper

src/Bundle/ChillMainBundle/Entity/HasCentersInterface.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Chill\MainBundle\Entity;
+
+interface HasCentersInterface
+{
+    public function getCenters(): ?iterable;
+}