We're now returning 422 and 422 on client errors

Seems to be a problem in our setup that prevents us from setting the
reason phrase, this should work (ref 1) however it doesn't on my side.
I suspect it might be related to me using java 6...

1. https://github.com/jersey/jersey/blob/master/tests/integration/jersey-1829/pom.xml)
Configured so I can use mvn jetty:run