to get around the verify error on jdk8u20 for ratpack-hystrix:test

see issue 450
Merge remote-tracking branch 'upstream/master'
update the test to expect JSON
changed the default result from string to JSON
clean up
clean up
undo the noverify
reverted to repo version
switching to using context.byContent, and also now using
content.getReponse().send to avoid lookup as per requested
undo the changes of paramers to final, I don't know the codebase
enough yet to be making this change
disable caching
Merge pull request #467 from wmacgyver/master

Render health checks as JSON for ratpack-codahale-metrics