Sweeping !34077 from 21.0 to master. Add readme and instructions to CaloSamplingFractionAnalysis package (!34452) · Merge requests · atlas / athena · GitLab

Atlas Nightlybuild requested to merge cherry-pick-4cf39c16a3-master into master Jul 04, 2020

Add readme and instructions to CaloSamplingFractionAnalysis package

See merge request !34077 (merged)