Comment 5 for bug 1667226

It's a minor bug in oslo_middleware in kilo and liberty: https://github.com/openstack/oslo.middleware/blob/liberty-eol/oslo_middleware/catch_errors.py#L40-L41

Because of that code '%s' doesn't substitutes with anything and we end up with such stracktrace in neutron log:

<163>May 25 14:31:11 node-2 neutron-server 2017-05-25 14:31:11.084 10287 ERROR oslo_middleware.catch_errors [-] An error occurred during processing the request: %s

That's why I've set status for kilo and liberty as Invalid.