replace more doctrine shortcuts by fqdn

src/Bundle/ChillReportBundle/Export/Export/ReportList.php

@@ -246,7 +246,7 @@ class ReportList implements ExportElementValidatedInterface, ListInterface
             case 'person_countryOfBirth':
             case 'person_nationality':
                 $countryRepository = $this->em
-                    ->getRepository('ChillMainBundle:Country');
+                    ->getRepository(\Chill\MainBundle\Entity\Country::class);
 
                 // load all countries in a single query
                  $countryRepository->findBy(['countryCode' => $values]);