Trigger efficiency and scale factor

This merge request includes the followings:

• new config files
  • configs/trigger_monitor_run2_Z_*.json: for monitoring pT turn-on, 1D eta trend and 1D nvtx trend (no syst included)
  • configstrigger_official_run2_Z_*.json: for the central trigger SFs in 2D (3D) eta-pT(-charge) bins with syst unc
  • currently, I had to make a config file for each year and each trigger path (16 in total) as the tag selection and binning definitions are slightly different (perhaps to be improved in the future...)
• new option, effType, in the fitting step for switching default sig/bkg shapes, initial parameters, etc
• new argument, condorTag, for additional labeling in the condor submission files
• small fixs to avoid ZeroDivisionError
• temporary fix for the pu weights
• using get_data_mc_sub_eras instead of get_allowed_sub_eras in flattener.py (to be consistent with fitter.py and preper.py) - to be discussed further
• minor bug fix in TagAndProbeFitter.set_fit_range

N.B. validation jobs are running so there could be some follow-up commits depending on the results