Summary:
Fixes T8958. I renamed this class and table (in D13644), but the migration `20150606.mlist.1.php` needs to load records from the table before the table rename applies.
Put the table back and accept a tiny bit of cruft here to fix this problem. We can no-op the migration after a while.
I'll cherry-pick this to `stable`.
Test Plan: Applied migration. Created Herald rules. Reviewed existing Herald rules.
Reviewers: btrahan
Subscribers: epriestley
Maniphest Tasks: T8958
Differential Revision: https://secure.phabricator.com/D13736
