message: Add guard check to prevent re-parsing JSON objects
  (workaround for
diff: @@ -124,8 +124,10 @@ app.use(bodyParser.text({ type: '*/*' }))
  app.use(function jsonParser (req, res, next) {
  req.rawBody = req.body
  if (req.headers['content-type'] !== undefined && req.headers['content-type'].indexOf('application/json') > -1) {
  + if (req.body !== Object(req.body)) { // TODO Expensive workaround for 500 errors during Frisby test run (see #640)
  req.body = JSON.parse(req.body)
  }
  + }
  next()
  })
  