Add checks for python2/3 compatibility of jO

an example DSID is 830099: https://gitlab.cern.ch/atlas-physics/pmg/mcjoboptions/-/blob/master/830xxx/830099/mc.H7EG_jetjet_72_Cluster_JZ1.py

R21: 21.6.85 R22: You can try 22.6.13 (later releases have issues with EvtGen_i — should be fixed soon).