Add missing b-tag years and l1 correlated
The year by year terms for the b-tagging fixedWP SFs were missing:
CMS_btag_heavy_(2016|2016APV|2017|2018)
and
CMS_btag_light_(2016|2016APV|2017|2018)
and a correlated term for the L1 ECAL prefire:
CMS_l1_ecal_prefiring
Edited by Brent Yates