R1:adeefa940f29

Use application PHIDs in Macro

Summary: Ref T2715. Move Macro to application PHIDs.

Test Plan: Used `conduit.query` to look up macros.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2715

Differential Revision: https://secure.phabricator.com/D6556