Fix G4AtlasApps configuration unit tests

`test_AtlasG4_cosmics_configuration.py` and `test_TestBeam_tf_configuration.py`
have been updated to take into account the fact that
`xAODMaker::EventInfoCnvAlg/xAODMaker::EventInfoCnvAlg` has been added to
the start of the AlgSequence of all jobs which generate events on-the-fly.