Sweeping !22228 from 21.3 to 21.9. Add configuration for new ATLFASTIIF_G4MS Simulator (!22329) · Merge requests · atlas / athena · GitLab

Atlas Nightlybuild requested to merge cherry-pick-361cf5d632-21.9 into 21.9 Apr 02, 2019

Add configuration for new ATLFASTIIF_G4MS Simulator

See merge request !22228 (merged)