Sweeping !23142 from 21.3 to 21.9. add UseCSC property to MuonIdHelperTool in case no CSCs are present anymore (!23448) · Merge requests · atlas / athena · GitLab

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Atlas Nightlybuild requested to merge cherry-pick-7c2a4e4021-21.9 into 21.9 May 15, 2019

add UseCSC property to MuonIdHelperTool in case no CSCs are present anymore

See merge request !23142 (merged)