Make PanopticonRegistrationTest more robust
Make PanopticonRegistrationTest more robust

This was intermittently failing because it was assuming that Dir.glob
would return files in alphabetical order, which it wasn't always.

ministryofjustice/calendars,alphagov/calendars,alphagov/calendars,alphagov/calendars,ministryofjustice/calendars,alphagov/calendars