Added test files
This was causing "extra" content api calls.

(not loads of them, just annoying new test files)
Don't really want that checked in :)
None of our cron or run once scheduled jobs will now run during tests.

 They are impossible to test (that way) and only result in random new data files.
Merge pull request #3721 from guardian/test-schedules

Cron (and run once) schedules cannot now run in Test mode