minor #13327 [HttpFoundation] maked a test as being for deprecated feature (fabpot)

This PR was merged into the 2.7 branch.

Discussion
----------

[HttpFoundation] maked a test as being for deprecated feature

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Commits
-------

a2ea28d [HttpFoundation] maked a test as being for deprecated feature

src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php

@@ -135,8 +135,10 @@ class FlashBagTest extends \PHPUnit_Framework_TestCase
     /**
      * @covers Symfony\Component\HttpFoundation\Session\Flash\FlashBag::getIterator
      */
-    public function testGetIterator()
+    public function testLegacyGetIterator()
     {
+        $this->iniSet('error_reporting', -1 & ~E_USER_DEPRECATED);
+
         $flashes = array('hello' => 'world', 'beep' => 'boop', 'notice' => 'nope');
         foreach ($flashes as $key => $val) {
             $this->bag->set($key, $val);