add low pileup lumi tables

add lumi tables for low pileup data (2018 & 2017)

approved this merge request

Can’t merge until you rebase…

added 5 commits

• ce69b4f3...a3dbac1a - 4 commits from branch cms-analysis/general/DasAnalysisSystem:master
• 894ebe41 - add low pileup lumi tables

Compare with previous version

mentioned in commit a80423e7

merged