Draft: Split photon identification and isolation flag in the cutflow
- Split photon identification and isolation flag in the cutflow following the HGam logic: select two leading loose photons and then apply Tight ID and Iso on them.
- add branches "bbyy_Photon1(2)_isTight(isIso)_NOSYS" to show whether the leading (sub-leading) photon passing the Tight ID (Iso)
- For #227 (closed)
- FYI @tstreble @lderamo @gdigrego @alwang