Add support for pile-up range in CA and campaign config

Add support for pile-up range in CA and campaign config:

• seamlessly handle userRunLumiOverride as pile-up range specification
• add equivalent flag to the CA-based config Digitization.PU.CustomProfile The behaviour is kept in sync between legacy and CA-based config.

This simplifies the command for legacy presampling to

Digi_tf.py \
--PileUpPresampling True \
--conditionsTag default:OFLCOND-MC16-SDR-RUN2-04 \
--digiSeedOffset1 170 --digiSeedOffset2 170 \
--digiSteeringConf "StandardSignalOnlyTruth" \
--geometryVersion default:ATLAS-R2-2016-01-00-01 \
--inputHITSFile ${HSHitsFile} \
--inputHighPtMinbiasHitsFile ${HighPtMinbiasHitsFiles} \
--inputLowPtMinbiasHitsFile ${LowPtMinbiasHitsFiles} \
--jobNumber 568 \
--maxEvents ${Events} \
--outputRDOFile ${DigiOutFileName} \
--postInclude 'default:PyJobTransforms/UseFrontier.py' \
--preExec 'HITtoRDO:userRunLumiOverride={"run":310000, "startmu":0.0, "endmu":10.0, "stepmu":1.0, "startlb":1, "timestamp": 1550000000};' \
--preInclude 'HITtoRDO:Campaigns/PileUpPresamplingMC20e.py'

legacy pile-up to

Digi_tf.py \
--conditionsTag default:OFLCOND-MC16-SDR-RUN2-04 \
--digiSeedOffset1 170 --digiSeedOffset2 170 \
--digiSteeringConf "StandardSignalOnlyTruth" \
--geometryVersion default:ATLAS-R2-2016-01-00-01 \
--inputHITSFile ${HSHitsFile} \
--inputHighPtMinbiasHitsFile ${HighPtMinbiasHitsFiles} \
--inputLowPtMinbiasHitsFile ${LowPtMinbiasHitsFiles} \
--jobNumber 568 \
--maxEvents ${Events} \
--outputRDOFile ${DigiOutFileName} \
--postInclude 'default:PyJobTransforms/UseFrontier.py' \
--preExec 'HITtoRDO:userRunLumiOverride={"run":310000, "startmu":0.0, "endmu":10.0, "stepmu":1.0, "startlb":1, "timestamp": 1550000000};' \
--preInclude 'all:Campaigns/MC20e.py' 'HITtoRDO:Campaigns/PileUpMC20e.py'

or CA-based presampling

Digi_tf.py \
--CA \
--PileUpPresampling True \
--conditionsTag default:OFLCOND-MC16-SDR-RUN2-04 \
--digiSeedOffset1 170 --digiSeedOffset2 170 \
--digiSteeringConf "StandardSignalOnlyTruth" \
--geometryVersion default:ATLAS-R2-2016-01-00-01 \
--inputHITSFile ${HSHitsFile} \
--inputHighPtMinbiasHitsFile ${HighPtMinbiasHitsFiles} \
--inputLowPtMinbiasHitsFile ${LowPtMinbiasHitsFiles} \
--jobNumber 568 \
--maxEvents ${Events} \
--outputRDOFile ${DigiOutFileName} \
--postInclude 'PyJobTransforms.UseFrontier' \
--preExec 'HITtoRDO:ConfigFlags.Digitization.PU.CustomProfile={"run":310000, "startmu":0.0, "endmu":10.0, "stepmu":1.0, "startlb":1, "timestamp": 1550000000};' \
--preInclude 'HITtoRDO:Campaigns.MC20e'

/cc @jchapman @goblirsc