Do not use HttpKernel Extension when not needed

Author: Tobion

Tests/Fixtures/ExtensionLoadedBundle/DependencyInjection/ExtensionLoadedExtension.php

@@ -12,7 +12,7 @@
 namespace Symfony\Component\HttpKernel\Tests\Fixtures\ExtensionLoadedBundle\DependencyInjection;
 
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+use Symfony\Component\DependencyInjection\Extension\Extension;
 
 class ExtensionLoadedExtension extends Extension
 {

Tests/Fixtures/ExtensionPresentBundle/DependencyInjection/ExtensionPresentExtension.php

@@ -12,7 +12,7 @@
 namespace Symfony\Component\HttpKernel\Tests\Fixtures\ExtensionPresentBundle\DependencyInjection;
 
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+use Symfony\Component\DependencyInjection\Extension\Extension;
 
 class ExtensionPresentExtension extends Extension
 {