Simplify Group.__getattr__
Simplify Group.__getattr__

__getattr__ is called only when an attribute lookup has not found the
attribute in the usual places, no need to double check.

rdhyee/PyTables,mohamed-ali/PyTables,avalentino/PyTables,jennolsen84/PyTables,dotsdl/PyTables,dotsdl/PyTables,PyTables/PyTables,dotsdl/PyTables,andreabedini/PyTables,rdhyee/PyTables,gdementen/PyTables,tp199911/PyTables,andreabedini/PyTables,rdhyee/PyTables,gdementen/PyTables,jennolsen84/PyTables,joonro/PyTables,rabernat/PyTables,FrancescAlted/PyTables,FrancescAlted/PyTables,jennolsen84/PyTables,gdementen/PyTables,PyTables/PyTables,tp199911/PyTables,avalentino/PyTables,dotsdl/PyTables,joonro/PyTables,mohamed-ali/PyTables,avalentino/PyTables,tp199911/PyTables,gdementen/PyTables,FrancescAlted/PyTables,joonro/PyTables,jennolsen84/PyTables,rabernat/PyTables,rabernat/PyTables,mohamed-ali/PyTables,PyTables/PyTables,andreabedini/PyTables,rdhyee/PyTables,rabernat/PyTables,mohamed-ali/PyTables,tp199911/PyTables,joonro/PyTables,andreabedini/PyTables