Add function addNNPuppiTau() to add Tau Lepton information

[schaefes]

Added Function:
def addNNPuppiTaus():
process.extraPFStuff.add(process.l1tNNTauProducerPuppi)
process.l1pfjetTable.jets.l1tau = cms.InputTag('l1tNNTauProducerPuppi', "L1PFTausNN")

Into runPerformanceNTuple.py
Adds information on tau leptons to the collection.
Could be useful for processes like GG->HH->bbtautau

[thesps]

Thanks for the contribution, I've requested a minor change for clarity in the ntuple