Add RewriteRule

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | should not
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | https://github.com/symfony/symfony/issues/9295
| License       | MIT
| Doc PR        | NA

Actually, Apache does not sets "HTTP_AUTHORIZATION" on bearer authorizations. This PR applies Symfony's recommendations by using a .htaccess to rewrite this header.

http://symfony.com/doc/current/cookbook/configuration/web_server_configuration.html