Enable scalar mode overrides for vtkCompositePolyDataMapper
Add override for scalar mode in composite polydata mapper. This lets the mapper specify that some blocks should use scalars from cell data and others can use scalars from point data. It helps integration with ParaView because both point and cell data arrays are clumped in one combo box.
The test was updated to override scalar mode = cell data for the quad on top right.
Edited by Jaswant Panchumarti (Kitware)