WCSim Validation

9570e9c855dad238ff2f21a4ee04fead0996ee63

Pull Request #553: Fix mPMT LED position

HKFD_500MeVem_centre_xdir

Tests
9603.68 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass