[DX] [FrameworkBundle] Added Crontoller::isCsrfTokenValid

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |
I would say ``of a CSRF token``. the way you wrote it looks like it is a class name, and the method does not accept a CsrfToken instance as argument