Closed requested to merge schaffer/athena:fix-stxs-for-ttH-jets into 21.2
In H4l, we were comparing the STXS truth jets vs AntiKt4TruthWZJets and noticed that for ttH that the jets coming from some of the W's were missing. This is because the ttH W's collected were not the last one in the parent/child hierarchy and so they failed the test that the W's must have quark as children. I know that @nberger and @okiverny are working on a new version, so this fix should be incorporated there as well. Also I see that @zmarshal put in this version... This is used in the derivation release.