The recent fix to disallow closing review requests as "submitted" before they

were ever published wasn't coexisting well with the close-submitted webhooks.

In the case where a user put the review request ID in for something that hadn't

been published, the webhook would throw a 500 error and e-mail the admins.
This change adds a step to publish the review request first before closing.

This ensures that any draft fields get copied over to the review request, and

that all the counters are correct.

Added a new unit test which failed before the change and succeeds after.