updated tests

tests/Symfony/Tests/Component/HttpFoundation/RequestTest.php

@@ -486,12 +486,12 @@ class RequestTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('PURGE', $request->getMethod(), '->getMethod() returns the method from _method if defined and POST');
 
         $request->setMethod('POST');
-        $request->server->set('X-HTTP-METHOD-OVERRIDE', 'delete');
+        $request->headers->set('X-HTTP-METHOD-OVERRIDE', 'delete');
         $this->assertEquals('DELETE', $request->getMethod(), '->getMethod() returns the method from X-HTTP-Method-Override even though _method is set if defined and POST');
 
         $request = new Request();
         $request->setMethod('POST');
-        $request->server->set('X-HTTP-METHOD-OVERRIDE', 'delete');
+        $request->headers->set('X-HTTP-METHOD-OVERRIDE', 'delete');
         $this->assertEquals('DELETE', $request->getMethod(), '->getMethod() returns the method from X-HTTP-Method-Override if defined and POST');
     }