Merge branch '2.8' into 3.0

* 2.8:
  fixed CS
  [DomCrawler] Dont use LIBXML_PARSEHUGE by default
  [Filesystem] Reduce complexity of ->remove()
  added tests for non-trusted proxies
  add 'guid' to list of exception to filter out
  Ensure backend slashes for symlinks on Windows systems
  [Filesystem] Try to delete broken symlinks
  fixed tests
  [FrameworkBundle] Test that ObjectNormalizer is registered

Author: fabpot

Tests/DependencyInjection/FrameworkExtensionTest.php

@@ -428,6 +428,17 @@ public function testSerializerEnabled()
         $this->assertEquals(new Reference('serializer.name_converter.camel_case_to_snake_case'), $container->getDefinition('serializer.normalizer.object')->getArgument(1));
     }
 
+    public function testObjectNormalizerRegistered()
+    {
+        $container = $this->createContainerFromFile('full');
+
+        $definition = $container->getDefinition('serializer.normalizer.object');
+        $tag = $definition->getTag('serializer.normalizer');
+
+        $this->assertEquals('Symfony\Component\Serializer\Normalizer\ObjectNormalizer', $definition->getClass());
+        $this->assertEquals(-1000, $tag[0]['priority']);
+    }
+
     public function testAssetHelperWhenAssetsAreEnabled()
     {
         $container = $this->createContainerFromFile('full');