fix deprecations: use fqcn

Controller/PersonController.php

@@ -145,7 +145,7 @@ class PersonController extends Controller
                 ->setCenter($defaultCenter);
 
         $form = $this->createForm(
-                CreationPersonType::NAME,
+                CreationPersonType::class,
                 $person,
                 array(
                    'action' => $this->generateUrl('chill_person_review'),

Export/Filter/NationalityFilter.php

@@ -27,6 +27,7 @@ use Chill\MainBundle\Templating\TranslatableStringHelper;
 use Doctrine\ORM\EntityRepository;
 use Chill\MainBundle\Entity\Country;
 use Chill\MainBundle\Export\ExportElementValidatedInterface;
+use Chill\MainBundle\Form\Type\Select2CountryType;
 use Symfony\Component\Validator\Context\ExecutionContextInterface;
 
 /**
@@ -55,7 +56,7 @@ class NationalityFilter implements FilterInterface,
 
     public function buildForm(FormBuilderInterface $builder)
     {
-        $builder->add('nationalities', 'select2_chill_country', array(
+        $builder->add('nationalities', Select2CountryType::class, array(
             'placeholder' => 'Choose countries'
         ));