changed mt2 to float , move block from Core to the multilepton, customiz...

...e susy had (no JetID , fill PU, add trigger bit , nMuons, nLeptons) , customized the HT/MHT and jets collection add the (rho, PUjetID, isData)
if you want it to be 1 for data and 0 for MC then better

     tr.fill('isData', 0 if isMC else 1)