Provide a standalone bin/calendar reload ... workflow for testing/debugging
Ref T11801. This makes testing/debugging a little easier.
Also fix some inconsistencies with importAuthorPHID handling -- it should be the import's author PHID in all cases, so we update imported events properly.
Test Plan: Imported a French holiday with bin/calendar reload ....
Reviewed By: chad
Maniphest Tasks: T11801
Differential Revision: https://secure.phabricator.com/D16814