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AnalysisTop -- consistent setup of truth jet collection for JVT efficiency tools

Oliver Majersky requested to merge omajersk/athena:AT-JVT-truthjets-config into 21.2

In AnalysisTop, the JVT efficiency tool was configured with the truth jet collection specified by user in config. This is potentially dangerous, because the recommendation for hard-scatter tagging of jets for JVT is to use AntiKt4TruthJets. This truth jet collection is generally discouraged from use in analyses due to lack of dressing.

This MR sets the JVT efficiency tool truth jet collection to AntiKt4TruthJet, and for DAOD_PHYS to AntiKt4TruthDressedWZJets since no other truth jet collection is available in PHYS. The TruthJetCollectionName setting in AnalysisTop is thus de-coupled from JVT efficiency tool configuration.

This change does not actually affect JVT SF calculation in AT, because the hard-scatter tagging of jets is done outside of JVT tool, using correct truth jet collection. Nevertheless if users retrieve the pre-configured JVT efficiency tool instance for their own purpose, this MR ensures consistent truth jets configuration.

Fixes ANALYSISTO-1000

Edited by Oliver Majersky

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