Sweeping !21904 from 21.3 to 21.9. Apply MMSimHit in MM fast digitization (ATLASSIM-3755) (!21947) · Merge requests · atlas / athena · GitLab

Atlas Nightlybuild requested to merge cherry-pick-84f662910d-21.9 into 21.9 Mar 15, 2019

Apply MMSimHit in MM fast digitization (ATLASSIM-3755)

See merge request !21904 (merged)