As I said I wanted to test real DI. In order to use real DI I need to introduce `SonataDoctrinePHPCRAdminBundle` bundle to make [`CmfRoutingExtension`](https://github.com/symfony-cmf/RoutingBundle/blob/master/DependencyInjection/CmfRoutingExtension.php#L137-L147) class load `routing_admin.xml` services.