replace more doctrine shortcuts by fqdn

src/Bundle/ChillPersonBundle/Export/Export/ListPerson.php

@@ -173,7 +173,7 @@ class ListPerson implements ExportElementValidatedInterface, ListInterface
             case 'countryOfBirth':
             case 'nationality':
                 $countryRepository = $this->entityManager
-                    ->getRepository('ChillMainBundle:Country');
+                    ->getRepository(\Chill\MainBundle\Entity\Country::class);
 
                 // load all countries in a single query
                  $countryRepository->findBy(['countryCode' => $values]);