replace docrine shortcuts in activity bundle by fqdn

src/Bundle/ChillActivityBundle/Tests/Controller/ActivityControllerTest.php

@@ -305,7 +305,7 @@ final class ActivityControllerTest extends WebTestCase
     {
         $reasons = self::$kernel->getContainer()
             ->get('doctrine.orm.entity_manager')
-            ->getRepository('ChillActivityBundle:ActivityReason')
+            ->getRepository(\Chill\ActivityBundle\Entity\ActivityReason::class)
             ->findAll();
 
         $reason = $reasons[array_rand($reasons)];