minor symfony#14598 [Security] Fix tests in HHVM (dosten)

This PR was merged into the 2.3 branch.

Discussion
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[Security] Fix tests in HHVM

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| License       | MIT

This PR fixes the tests in the Security components when run in HHVM. The failing tests are related to sebastianbergmann/phpunit-mock-objects#207

Commits
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139bae7 Fix tests in HHVM

Author: fabpot

src/Symfony/Component/Security/Tests/Http/Authentication/DefaultAuthenticationFailureHandlerTest.php

@@ -38,7 +38,7 @@ protected function setUp()
         $this->session = $this->getMock('Symfony\Component\HttpFoundation\Session\SessionInterface');
         $this->request = $this->getMock('Symfony\Component\HttpFoundation\Request');
         $this->request->expects($this->any())->method('getSession')->will($this->returnValue($this->session));
-        $this->exception = $this->getMock('Symfony\Component\Security\Core\Exception\AuthenticationException');
+        $this->exception = $this->getMock('Symfony\Component\Security\Core\Exception\AuthenticationException', array('getMessage'));
     }
 
     public function testForward()