fix deprecations: getName -> getBlockPrefix in forms

Form/CustomFieldsGroupType.php

@@ -102,7 +102,7 @@ class CustomFieldsGroupType extends AbstractType
     /**
      * @return string
      */
-    public function getName()
+    public function getBlockPrefix()
     {
         return 'custom_fields_group';
     }

Form/Type/ChoiceWithOtherType.php

@@ -56,7 +56,7 @@ class ChoiceWithOtherType extends AbstractType
         ;
     }
 
-    public function getName()
+    public function getBlockPrefix()
     {
         return 'choice_with_other';
     }

Form/Type/ChoicesListType.php

@@ -61,7 +61,7 @@ class ChoicesListType extends AbstractType
      *
      * @see \Symfony\Component\Form\FormTypeInterface::getName()
      */
-    public function getName()
+    public function getBlockPrefix()
     {
         return 'cf_choices_list';
     }

Form/Type/ChoicesType.php

@@ -12,7 +12,7 @@ use Symfony\Component\Form\Extension\Core\Type\CollectionType;
  */
 class ChoicesType extends AbstractType
 {
-    public function getName()
+    public function getBlockPrefix()
     {
         return 'cf_choices';
     }

Form/Type/CustomFieldType.php

@@ -63,7 +63,7 @@ class CustomFieldType extends AbstractType
                 ;
     }
 
-    public function getName()
+    public function getBlockPrefix()
     {
         return 'custom_field';
     }

Form/Type/LinkedCustomFieldsType.php

@@ -132,7 +132,7 @@ class LinkedCustomFieldsType extends AbstractType
         }
     }
 
-    public function getName()
+    public function getBlockPrefix()
     {
         return 'custom_fields_group_linked_custom_fields';
     }