replace some entity shortcut by fqdn

* ChillPerson:Person
* ChillMain:Center
* ChillActivity:Activity

src/Bundle/ChillPersonBundle/Controller/AccompanyingPeriodController.php

@@ -451,7 +451,7 @@ class AccompanyingPeriodController extends AbstractController
     private function _getPerson(int $id): Person
     {
         $person = $this->getDoctrine()->getManager()
-            ->getRepository('ChillPersonBundle:Person')->find($id);
+            ->getRepository(\Chill\PersonBundle\Entity\Person::class)->find($id);
 
         if (null === $person) {
             throw $this->createNotFoundException('Person not found');