Correctly pass worker priority from reparse script
Summary: D11044 broke the ./scripts/repository/reparse.php script.
Test Plan: ./scripts/repository/reparse.php --message --all X
Reviewers: btrahan, #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D11211