Merge branch 'cherry-pick-f5551669 [formerly 1c9b8fea52]-21.0' into '21.0'

Sweeping !15910 from 21.1 to 21.0.
fixes for trigger ART test monitoring

See merge request atlas/athena!15977

Former-commit-id: f71924834ae8dfb3d66bdd7e76dad1d5d720557c

Trigger/TrigValidation/TriggerTest/test/exec_art_triggertest_post.sh

@@ -13,7 +13,7 @@ if [ -z ${TEST} ]; then
 fi
 
 if [ -z ${REF_FOLDER} ]; then
-  export REF_FOLDER="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/${TEST}/ref/${AtlasBuildBranch}/${NAME}"
+  export REF_FOLDER="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/${TEST}/ref/${AtlasBuildBranch}/test_${NAME}"
 fi
 
 ###
@@ -33,6 +33,8 @@ timeout 1m chainDump.py -S --rootFile=expert-monitoring.root
 export JOB_LOG_TAIL=${JOB_LOG%%.*}.tail.${JOB_LOG#*.}
 tail -10000  ${JOB_LOG} > ${JOB_LOG_TAIL}
 
+grep REGTEST athena.log > athena.regtest
+
 if [ -f ${REF_FOLDER}/athena.regtest ]; then
   echo $(date "+%FT%H:%M %Z")"     Running regtest"
   grep REGTEST athena.log > athena.regtest