* 2.7:
  [appveyor] set memory_limit=-1
  [Router] Skip anonymous classes when loading annotated routes
  Fixed Request::__toString ignoring cookies
  [Security] Fix fatal error on non string username

…cher)

This PR was merged into the 2.8 branch.

Discussion
----------

[Security] fix merge of 2.7 into 2.8 + add test case

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #26109
| License       | MIT
| Doc PR        | -

This fixes the merge mistake done in 899bf99

that caused this fail with the added test case:

```
There was 1 failure:

1) Symfony\Component\Security\Tests\Http\Firewall\UsernamePasswordFormAuthenticationListenerTest::testHandleNonStringUsername with data set #1 (false)
Failed asserting that exception of type "TypeError" matches expected exception "\Symfony\Component\HttpKernel\Exception\BadRequestHttpException". Message was: "Argument 1 passed to Symfony\Component\Security\Http\ParameterBagUtils::getParameterBagValue() must be an instance of Symfony\Component\HttpFoundation\ParameterBag, instance of Symfony\Component\HttpFoundation\Request given, called in /var/www/symfony/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php on line 100" at
/var/www/symfony/src/Symfony/Component/Security/Http/ParameterBagUtils.php:39
/var/www/symfony/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php:100
/var/www/symfony/src/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php:140
/var/www/symfony/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordFormAuthenticationListenerTest.php:102
```

Original fix in 2.7: https://github.com/symfony/symfony/pull/25657/files#diff-e07c3e5653e210d017545d47c1bd7e76R111

Commits
-------

51d9008 [Security] fix merge of 2.7 into 2.8 + add test case