WCSim Validation

3c59f8e8bd8253bceacc4ed688c19749be6a9d5c

Pull Request #518: Update IWCD ID mPMTs and OD layout

IWCDOD_500MeVem_centre_xdir

Tests
3070.63 sec
Failed wcsimrootevent plot comparisons
Failed wcsimrootevent2 plot comparisons
Failed wcsimrootevent_OD plot comparisons
Geom
bad pass
Geometry warnings pass