Update Pandora track and shower discrimination scheme and training#840

rtriozzi wants to merge 3 commits intodevelopSBNSoftware/icaruscode:developfrom

feature/rtriozzi_TrackShowerDiscrimination_ICARUSCollectionSBNSoftware/icaruscode:feature/rtriozzi_TrackShowerDiscrimination_ICARUSCollectionCopy head branch name to clipboard