Updates services and info data fixture

* Adds previously missing "link" key

* Services and info data requests to Rummager are now returned ordered by
title

* Changes example query to include ordering by title
Adds no services and info data found helper
Merge pull request #176 from alphagov/update-rummager-test-helpers

Update rummager test helpers

https://www.pivotaltracker.com/story/show/75342126