title: FOSOAuthServerBundle + Symfony 4 Configuration - can't import routes
body: <p>I'm trying to configure the Bundle according to the official documentation, but when I add routes (as described in the docs)</p>
  
  <blockquote>
    <p>Import the routing.yml configuration file in app/config/routing.yml:
    fos_oauth_server_token:
        resource: "@FOSOAuthServerBundle/Resources/config/routing/token.xml"
    fos_oauth_server_authorize:
        resource: "@FOSOAuthServerBundle/Resources/config/routing/authorize.xml"</p>
  </blockquote>
  
  <p>I got an error: </p>
  
  <blockquote>
    <p>There is no extension able to load the configuration for "fos_oauth_server_token" (in /var/app/ondeck/config/packages/routing.yaml). Looked for namespace "fos_oauth_server_token", found "framework", "twig", "security", "nelmio_cors", "doctrine_cache", "doctrine", "api_platform", "fos_oauth_server" in /var/app/ondeck/config/packages/routing.yaml (which is loaded in resource "/var/app/ondeck/config/packages/routing.yaml").</p>
  </blockquote>
  
  <p>Any ideas?</p>