Support unlocking applications with bin/policy
Summary: Ref T603. If you get in trouble, bin/policy unlock PHID-APPS-PhabricatorApplicationDifferential and such can get you out now.
Test Plan: Unlocked an application.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T603
Differential Revision: https://secure.phabricator.com/D7206