BAC-177: use datamart in RenameUserHelper
BAC-177: use rollup_edit_events in UserRollbackTask.class.php
Merge branch 'dev' into bac-177-stats-events
Revert "BAC-177: use rollup_edit_events in UserRollbackTask.class.php"

This reverts commit 8271acfb17e82b353db6b0081b51c018621a6eae.
Merge pull request #942 from Wikia/bac-177-stats-events

BAC-336: Use datamart in RenameUserHelper