Add taus back into the ntuple content

[kreczko]

Motivation: get an idea of our tau contamination. This might be useful for EA, but probably more important for anything after it (when fake rates are better understood).

Use pat::Taus out of the box and store

• four vector
• charge
• tau IDs (store float values as cuts might change)
  • float pat::Tau::tauID("decayModeFindingOldDMs") (> 0.5)
  • float pat::Tau::tauID("byCombinedIsolation3HitsLoose") (> 0.5)
  • float pat::Tau::tauID("againstElectronMediumMVA5") (> 0.5)

More information:
https://twiki.cern.ch/twiki/bin/view/CMSPublic/SWGuidePFTauID
https://indico.cern.ch/event/399337/session/0/contribution/116/material/slides/0.pdf (slide 17)