Extract nEventsPerJob as in ProdSys and move minevents check to check_jo_consistency

Changes introduced

• Use code from ProdSys to extract nEventsPerJob from file (!580 (merged))
• logParser extracts nEventsPerJob using the jo_utils.py script which mimics what's done in ProdSys
• The check for evgenConfig.minevents has been moved from logParser to check_jo_consistency which is always run. This is done because ProdSys will first check minevents and only then check nEventsPerJob, so a file that contains minevents which was not tested (run with Gen_tf) locally or in the CI, might end up in the production system with the wrong settings.

Tests

ERROR when minevents is found in jO

https://gitlab.cern.ch/atlas-physics/pmg/mcjoboptions/-/jobs/9302962

logParser correctly extracts nEventsPerJob from log.generate

Complete pipeline here: https://gitlab.cern.ch/atlas-physics/pmg/mcjoboptions/pipelines/1806615

run_athena.sh runs with correct number of events

Successful pipeline here: https://gitlab.cern.ch/atlas-physics/pmg/mcjoboptions/-/jobs/9303042

Todos

• Re-introduce ERROR when minEvents is used
• Test logParser
• Test athena

Issues resolved

Closes #98 (closed)