Add compiler pass to fix Symfony validator definition bug

Author: matthiasnoback

Compiler/Compatibility/FixSymfonyValidatorDefinitionPass.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Matthias\SymfonyServiceDefinitionValidator\Compiler\Compatibility;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+class FixSymfonyValidatorDefinitionPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        if ($container->hasDefinition('validator')) {
+            $container->getDefinition('validator')->setClass('Symfony\Component\Validator\Validator');
+        }
+    }
+}