Merge pull request DATA-DOG#69 from natewiebe13/use-class-metadata-fo…

…r-associations

Doctrine Proxy Class Metadata

src/DataDog/AuditBundle/EventSubscriber/AuditSubscriber.php

@@ -404,7 +404,7 @@ protected function assoc(EntityManager $em, $association = null)
             return null;
         }
 
-        $meta = get_class($association);
+        $meta = $em->getClassMetadata(get_class($association))->getName();
         $res = ['class' => $meta, 'typ' => $this->typ($meta), 'tbl' => null, 'label' => null];
 
         try {