Display auditors in audit commit list
Summary: Users wonder who is actually doing all these audits.
Test Plan:
/owners/package/1/
/audit/view/packagecommits/?phid=PHID-OPKG-1
Reviewers: epriestley
Reviewed By: epriestley
CC: jungejason, aran, Korvin
Differential Revision: https://secure.phabricator.com/D3597