Fix transiant tests in 4.4

Author: jderusse

Tests/Loader/DependencyInjection/ServiceRouterLoaderTest.php

@@ -9,7 +9,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Symfony\Component\Routing\Tests\Loader;
+namespace Symfony\Component\Routing\Tests\Loader\DependencyInjection;
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Container;