removing namespace usage from Zend\Form\Element\FileTest\Adapter\Bar to support php 5.2

tests/Zend/Form/Element/FileTest.php

@@ -511,7 +511,7 @@ class Zend_Form_Element_FileTest extends PHPUnit_Framework_TestCase
         $this->element->setTransferAdapter('Bar');
         $test = $this->element->getTransferAdapter();
         $this->assertTrue(
-            $test instanceof \Zend\Form\Element\FileTest\Adapter\Bar
+            $test instanceof Zend\Form\Element\FileTest\Adapter\Bar
         );
     }