message: Increase timeout for liking reviews to 250ms
  (was originally 150ms when 3 likes were expected to solve
  race condition. With 200ms it sometimes failed on Travis
  since demanding 5 likes for the challenge.)
diff: @@ -41,7 +41,7 @@ module.exports = function productReviews () {
  }, () => {
  res.status(400).json({ error: 'Wrong Params' })
  })
  - }, 200)
  + }, 250)
  }, err => {
  res.status(500).json(err)
  })
  