Merge topic 'vtkCheckerboardSplatter_scalar_array'

799a06ed Use specified array to splatter volumes in vtkCheckerboardSplatter.

Acked-by: Kitware Robot <kwrobot@kitware.com>
Reviewed-by: Utkarsh Ayachit <utkarsh.ayachit@kitware.com>
Merge-request: !1189
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