release/21.6.78

Ewelina Maria Lobodzinska

@ewelina

7d29f1b7 · Merge branch '21.6-MG295' into '21.6' · Sep 07, 2021

validation release for MG 2.95
contains MRs:
update systematic tool https://gitlab.cern.ch/atlas/athena/-/merge_requests/46080
MG 2.95 https://gitlab.cern.ch/atlas/athena/-/merge_requests/46346