Merge branch '3.0'

* 3.0:
  [PropertyAccess] ->getValue() should be read-only
  [VarDumper] Fix dumping type hints for non-existing parent classes
  [Config] Fix XmlUtilsTest namespace
  [Console] [TableHelper] make it work with SymfonyStyle.
  Remove dead code
  [FrameworkBundle] Better output for user in ContainerDebugCommand
  [Routing] add query param if value is different from default

Author: nicolas-grekas

Tests/Util/XmlUtilsTest.php

@@ -9,7 +9,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Symfony\Component\Config\Tests\Loader;
+namespace Symfony\Component\Config\Tests\Util;
 
 use Symfony\Component\Config\Util\XmlUtils;