[main] fix deprecations for Export/PickCenterType

src/Bundle/ChillMainBundle/Form/Type/Export/PickCenterType.php

@@ -75,14 +75,16 @@ class PickCenterType extends AbstractType
 
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
+
+
         $export = $this->exportManager->getExport($options['export_alias']);
         $centers = $this->authorizationHelper->getReachableCenters(
             $this->user,
-            $export->requiredRole()
+            $export->requiredRole()->__toString()
         );
 
         $builder->add(self::CENTERS_IDENTIFIERS, EntityType::class, [
-            'class' => 'ChillMainBundle:Center',
+            'class' => Center::class,
             'query_builder' => static function (EntityRepository $er) use ($centers) {
                 $qb = $er->createQueryBuilder('c');
                 $ids = array_map(