[Validator][Hackday] [2.7] Add a deprecation note about ValidationVisitorInterface and ValidationVisitor #12675

Author: neoshadybeat

ValidationVisitor.php

@@ -79,6 +79,8 @@ class ValidationVisitor implements ValidationVisitorInterface, GlobalExecutionCo
      */
     public function __construct($root, MetadataFactoryInterface $metadataFactory, ConstraintValidatorFactoryInterface $validatorFactory, TranslatorInterface $translator, $translationDomain = null, array $objectInitializers = array())
     {
+        trigger_error('Symfony\Component\Validator\ValidationVisitor was deprecated in version 2.5 and will be removed in version 3.0.', E_USER_DEPRECATED);
+
         foreach ($objectInitializers as $initializer) {
             if (!$initializer instanceof ObjectInitializerInterface) {
                 throw new UnexpectedTypeException($initializer, 'Symfony\Component\Validator\ObjectInitializerInterface');

ValidationVisitorInterface.php

@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Validator;
 
+trigger_error('Symfony\Component\Validator\ValidationVisitorInterface was deprecated in version 2.5 and will be removed in version 3.0.', E_USER_DEPRECATED);
+
 /**
  * Validates values against constraints defined in {@link MetadataInterface}
  * instances.