fix deprecations: use fqcn for FormType

Controller/ReportController.php

@@ -25,6 +25,7 @@ use Symfony\Component\HttpFoundation\Request;
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
 use Symfony\Component\Security\Core\Role\Role;
+use Symfony\Component\Form\Extension\Core\Type\FormType;
 
 use Chill\PersonBundle\Entity\Person;
 use Chill\ReportBundle\Entity\Report;
@@ -132,7 +133,7 @@ class ReportController extends Controller
         }
 
         $form = $this->get('form.factory')
-            ->createNamedBuilder(null, 'form', null, array(
+            ->createNamedBuilder(null, FormType::class, null, array(
                 'method' => 'GET',
                 'csrf_protection' => false
             ))