R1:3775e144786a

Use scoped names in revision query

Test Plan:
id(new DifferentialRevisionQuery())
->withIDs($revision_ids)
->withDraftRepliesByAuthors($user_phids)
->execute();

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3322