Rename ArcanistLintRenderer subclasses
Summary: Ref T5655.
Test Plan: arc lint and arc unit
Reviewers: epriestley, Blessed Reviewers
Reviewed By: epriestley, Blessed Reviewers
Subscribers: epriestley, Korvin
Maniphest Tasks: T5655
Differential Revision: https://secure.phabricator.com/D10011