change storage of some MET variables
Remove some MET-related variables that no longer need to be in the ntuples:
- minDeltaPhiN
- DeltaPhiN1
- DeltaPhiN2
- DeltaPhiN3
- minDeltaPhiNclean
Add some new ones:
- CaloMETPt
- CaloMETPhi
- METPhiclean
- MHT_Phiclean
Note: at this time, CaloMET variables are the raw versions (corrections currently don't exist) and must be taken from the original slimmedMETs collection in the event (the re-corrected collection drops the CaloMET values). Also, currently doesn't work for 2015D when running in CMSSW_7_4_6_patch6 because of changes in the miniAOD format, but this should be remedied in the move to re-miniAOD and 7_4_1X.