[Security] [Firewall] Bug fixed in SimplePreAuthenticationListener when createToken() not return TokenInterface object

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | no
| Fixed tickets | 
| License       | MIT
| Doc PR        | 
This must be ignored locally instead, because they are specific to your development environment, not to Symfony (and you should ignore **all** your netbeans files, not only the private ones. We don't want the other netbeans files in the repo either): https://help.github.com/articles/ignoring-files