request_id only shown when exception is raised

Hello and thank you for the library. I'm currently using version `0.10.1` and I'm having an issue that the header `X-Request-Id` is only visible in the `werkzeug` logs if an exception is raised. I've created a small working example that shows what I mean; you can clone it from https://github.com/ivica-k/request_id_example

Let me know if I can provide any more information.