fix extension test namespaces

tests/Silex/Tests/Extension/MonologExtensionTest.php

@@ -9,7 +9,7 @@
  * with this source code in the file LICENSE.
  */
 
-namespace Silex\Tests;
+namespace Silex\Tests\Extension;
 
 use Monolog\Handler\TestHandler;
 

tests/Silex/Tests/Extension/SessionExtensionTest.php

@@ -9,7 +9,7 @@
  * with this source code in the file LICENSE.
  */
 
-namespace Silex\Tests;
+namespace Silex\Tests\Extension;
 
 use Silex\Application;
 use Silex\Extension\SessionExtension;

tests/Silex/Tests/Extension/TwigExtensionTest.php

@@ -9,7 +9,7 @@
  * with this source code in the file LICENSE.
  */
 
-namespace Silex\Tests;
+namespace Silex\Tests\Extension;
 
 use Silex\Application;
 use Silex\Extension\TwigExtension;

tests/Silex/Tests/Extension/UrlGeneratorExtensionTest.php

@@ -9,7 +9,7 @@
  * with this source code in the file LICENSE.
  */
 
-namespace Silex\Tests;
+namespace Silex\Tests\Extension;
 
 use Silex\Application;
 use Silex\Extension\UrlGeneratorExtension;