Fixes on cuts and photon CR
This MR consists of 2 things:
- The application of the new deltaPhi cuts in the photon CR
- The correction of 2 bugs regarding prescales :
- The "new" method for prescales was not applied on the PhotonTrees analysis
- The cut based on photon trigger pT thresholds should apply also to MC, not only to data
I also removed entirely the "old" method of computing prescales (to prevent future errors and confusions).
Recomputed weights are still up-to-date (for 2016), as they were computed using InstrMetAnalysis
which applied correctly the new version of prescales.