minor #13518 [SecurityBundle] fixed tests where cleanup was not done properly (fabpot)

This PR was merged into the 2.6 branch.

Discussion
----------

[SecurityBundle] fixed tests where cleanup was not done properly

| 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
-------

f853cf2 [SecurityBundle] fixed tests where cleanup was not done properly

src/Symfony/Bundle/SecurityBundle/Tests/Functional/SetAclCommandTest.php

@@ -151,6 +151,20 @@ class SetAclCommandTest extends WebTestCase
         $this->assertTrue($acl2->isGranted($permissionMap->getMasks($grantedPermission, null), array($roleSecurityIdentity)));
     }
 
+    protected function setUp()
+    {
+        parent::setUp();
+
+        $this->deleteTmpDir('Acl');
+    }
+
+    protected function tearDown()
+    {
+        parent::tearDown();
+
+        $this->deleteTmpDir('Acl');
+    }
+
     private function getApplication()
     {
         $kernel = $this->createKernel(array('test_case' => 'Acl'));