WCSim Validation

4b3d2535ffec2b6b26948c9ca613fce93e99da2b

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

SK_500MeVem_centre_xdir

Tests
3200.61 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass