Disable auto cache control header

[alexsegura]

Hi.

When the fos_js_routing_js route is behind a firewall, the cache control config is ignored.

HTTP Caching and User Sessions

Whenever the session is started during a request, Symfony turns the response into a private non-cacheable response. This is the best default behavior to not cache private user information (e.g. a shopping cart, a user profile details, etc.) and expose it to other visitors.

As this route will most probably never be dependent on user session, I think it's safe to disable this behavior 🙂

[tobias-93]

Thanks @alexsegura