Add rake task to republish documents by document type
Add rake task to republish documents by document type

We would like to prioritise republishing organisation pages if there
is a delay due to a large publishing queue.

This rake task gives us the flexibilty to pass any document type(s)
and republish all affected editions using the `high_priority`
sidekiq queue.

alphagov/publishing-api,alphagov/publishing-api