Adding protection for VINCIA usage

Changes introduced

Make sure that VINCIA is run only with Pythia versions 8.311 or higher (see Pythia update history for bug fixes in 8.311)

Tests

from https://bigpanda.cern.ch//media/filebrowser/82bd7e3f-8aa1-438d-bcc3-e75c7be9cd0c/mc15_13TeV/tarball_PandaJob_6025044883_MWT2/log.generate

https://gitlab.cern.ch/atlas-physics/pmg/mcjoboptions/-/blob/master/602xxx/602639/mc.PhPy8EG_VINCIA_A14_ttbar_hdamp258p75_nonallhad.py

Issues resolved

Closes #230 (closed)

FYI @dhirsch