erd.py: fix for bug 393 - handled in erd vs base_relation.lookup_class_name
erd.py: fix for bug 393 - handled in erd vs base_relation.lookup_class_name

other option would be to modify 'lookup_class_name'; this seems less intrusive
and localized to the problem - other uses of lookup_class_name do not need/use
'module' component and skipping search in '_' there could potentially cause
undefined behvior in some corner cases.

eywalker/datajoint-python,fabiansinz/datajoint-python,datajoint/datajoint-python,dimitri-yatsenko/datajoint-python