Stubber should report failed match details

[Controlix]

When the pact stubber fails to match a request it returns a 598 status code.
It would be nice to know what part of the request did not match, like the consumer tests do when interactions don't match. That would help a lot to investigate producer test failures using the stubber.

[davesmith00000]

That's an excellent idea! I'm quite surprised nobody's suggested it before!

[Controlix]

I noticed that the full details of the matching failure is already in the response body from the stubber.
So I guess it's a small effort to enable some logging of it in one way or another.