Merge pull request #164 from finn-no/improve_output_on_failing_expectations_unexpected_requests

Improve output on failing expectations and unexpected requests
Tidy up
[maven-release-plugin] prepare release rest-driver-1.1.38
[maven-release-plugin] prepare for next development iteration
Add option to turn off fail fast for unexp. req.

This makes unexpected requests only fail when checking for it
specifically with
ClientDriverJettyHandler.noFailFastOnUnexpectedRequest()