Fix #6374 move FormBuilderInterface from Tests to Test

src/Symfony/Component/Form/Test/FormBuilderInterface.php

@@ -9,7 +9,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Symfony\Component\Form\Tests;
+namespace Symfony\Component\Form\Test;
 
 interface FormBuilderInterface extends \Iterator, \Symfony\Component\Form\FormBuilderInterface
 {

src/Symfony/Component/Form/Tests/FormFactoryTest.php

@@ -638,6 +638,6 @@ class FormFactoryTest extends \PHPUnit_Framework_TestCase
 
     private function getMockFormBuilder()
     {
-        return $this->getMock('Symfony\Component\Form\Tests\FormBuilderInterface');
+        return $this->getMock('Symfony\Component\Form\Test\FormBuilderInterface');
     }
 }