Store MET uncertainty variations in vectors
Order of the variations, as indicated in the code:
JetRes, JetEn, MuonEn, ElectronEn, TauEn, UnclusteredEn, PhotonEn
also fix typo in looper script
Order of the variations, as indicated in the code:
JetRes, JetEn, MuonEn, ElectronEn, TauEn, UnclusteredEn, PhotonEn
also fix typo in looper script