Fixed a bug with RequestBodyCop

Fixed a bug with the RequestBodyCop validating it's schema against the response body rather than the request body.
Foreman is supposed to be installed system wide, because `bundle exec foreman` won't always behave correct. The [Foreman readme](https://github.com/ddollar/foreman) says:
> Ruby users should take care not to install foreman in their project's `Gemfile`.

I *would* like to ditch Foreman and just launch the sample server in the background when needed. My problemw as that on JRuby most projects I tried to do that with said "fork is not supported on this platform", so I hooked up Foreman and used it to start the samples services on Travis-CI.

If I can't fix that, maybe I can at least get so foreman is only used for JRuby on Travis-CI.