minor #16138 [Security\Core] Fix test failure after sebastianbergmann/phpunit#1821 (nicolas-grekas)

This PR was merged into the 2.3 branch.

Discussion
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[Security\Core] Fix test failure after sebastianbergmann/phpunit#1821

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #16112
| License       | MIT
| Doc PR        | -

See sebastianbergmann/phpunit#1821

Commits
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742547c [Security\Core] Fix test failure after sebastianbergmann/phpunit#1821

src/Symfony/Component/Security/Tests/Core/Authorization/AccessDecisionManagerTest.php

@@ -96,7 +96,7 @@ class AccessDecisionManagerTest extends \PHPUnit_Framework_TestCase
     protected function getVoterFor2Roles($token, $vote1, $vote2)
     {
         $voter = $this->getMock('Symfony\Component\Security\Core\Authorization\Voter\VoterInterface');
-        $voter->expects($this->exactly(2))
+        $voter->expects($this->any())
               ->method('vote')
               ->will($this->returnValueMap(array(
                   array($token, null, array('ROLE_FOO'), $vote1),