TrigInDetValidation : add cost monitoring to ART tests
Add option to do cost monitoring in trigger ART tests.
Enable this for TrigIndetValidation tests and add the necessary post-processing steps.
modified: Trigger/TrigValidation/TrigInDetValidation/python/TrigInDetArtSteps.py
modified: Trigger/TrigValidation/TrigInDetValidation/share/TrigInDetValidation_Base.py
modified: Trigger/TrigValidation/TrigValTools/python/TrigValSteering/ExecStep.py