Add definition of GenFiltHT with neutrinos included

This MR introduces another definition of HT filter in derivation framework, called GenFiltHTinclNu, which includes neutrinos from W/Z/Tau decays.

This definition is found to agree with the HT definition from EVGEN for those samples which had switched on the option to include neutrinos from W/ZTau decays in the HT definition, for example the all-hadronic HT-sliced PP8 ttbar samples (DSID 410429 and 410444).

The original GenFiltHT definition is also kept, since we also have samples (e.g. non-allhad ttbar HT-sliced samples) which were generated with HT definition without including the neutrinos.

The original report can be found in the PMG top processes mailing list archive