Update Infovis example displayVTKHierarchy.py to work with current API
Update Infovis example displayVTKHierarchy.py to work with current API

The example was out of sync with current API and method of Python
wrapping.

candy7393/VTK,jmerkow/VTK,jmerkow/VTK,hendradarwin/VTK,aashish24/VTK-old,collects/VTK,johnkit/vtk-dev,hendradarwin/VTK,SimVascular/VTK,johnkit/vtk-dev,mspark93/VTK,biddisco/VTK,gram526/VTK,msmolens/VTK,msmolens/VTK,biddisco/VTK,sankhesh/VTK,sankhesh/VTK,cjh1/VTK,gram526/VTK,keithroe/vtkoptix,SimVascular/VTK,gram526/VTK,sumedhasingla/VTK,SimVascular/VTK,demarle/VTK,demarle/VTK,cjh1/VTK,berendkleinhaneveld/VTK,jmerkow/VTK,johnkit/vtk-dev,demarle/VTK,hendradarwin/VTK,gram526/VTK,johnkit/vtk-dev,mspark93/VTK,johnkit/vtk-dev,gram526/VTK,keithroe/vtkoptix,ashray/VTK-EVM,demarle/VTK,gram526/VTK,aashish24/VTK-old,keithroe/vtkoptix,gram526/VTK,ashray/VTK-EVM,candy7393/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,aashish24/VTK-old,biddisco/VTK,mspark93/VTK,hendradarwin/VTK,sumedhasingla/VTK,mspark93/VTK,msmolens/VTK,ashray/VTK-EVM,ashray/VTK-EVM,aashish24/VTK-old,collects/VTK,sumedhasingla/VTK,biddisco/VTK,candy7393/VTK,hendradarwin/VTK,SimVascular/VTK,candy7393/VTK,collects/VTK,hendradarwin/VTK,ashray/VTK-EVM,cjh1/VTK,msmolens/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,msmolens/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,sankhesh/VTK,candy7393/VTK,berendkleinhaneveld/VTK,aashish24/VTK-old,msmolens/VTK,sumedhasingla/VTK,jmerkow/VTK,demarle/VTK,ashray/VTK-EVM,sumedhasingla/VTK,mspark93/VTK,msmolens/VTK,candy7393/VTK,candy7393/VTK,ashray/VTK-EVM,biddisco/VTK,mspark93/VTK,demarle/VTK,biddisco/VTK,sumedhasingla/VTK,jmerkow/VTK,mspark93/VTK,mspark93/VTK,hendradarwin/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,SimVascular/VTK,sankhesh/VTK,demarle/VTK,keithroe/vtkoptix,sankhesh/VTK,keithroe/vtkoptix,SimVascular/VTK,aashish24/VTK-old,candy7393/VTK,johnkit/vtk-dev,jmerkow/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,cjh1/VTK,collects/VTK,msmolens/VTK,ashray/VTK-EVM,keithroe/vtkoptix,sankhesh/VTK,SimVascular/VTK,cjh1/VTK,sumedhasingla/VTK,jmerkow/VTK,biddisco/VTK,cjh1/VTK,jmerkow/VTK,johnkit/vtk-dev,demarle/VTK,collects/VTK,collects/VTK,gram526/VTK,keithroe/vtkoptix