Only wrap namespaces that have useful contents.
Only wrap namespaces that have useful contents.

Namespaces are often used just for forward declarations of third
party classes, e.g. boost or even std.  We don't want to wrap these,
we only want to wrap namespaces that are part of our API.  For now,
that means wrapping namespaces that define useful constants.

Change-Id: Icdd111c2e8b3c9031cde1a5409a74f3d09767e69

gram526/VTK,mspark93/VTK,gram526/VTK,candy7393/VTK,msmolens/VTK,jmerkow/VTK,sumedhasingla/VTK,jmerkow/VTK,ashray/VTK-EVM,johnkit/vtk-dev,candy7393/VTK,demarle/VTK,hendradarwin/VTK,SimVascular/VTK,candy7393/VTK,mspark93/VTK,demarle/VTK,hendradarwin/VTK,mspark93/VTK,SimVascular/VTK,mspark93/VTK,sumedhasingla/VTK,candy7393/VTK,hendradarwin/VTK,demarle/VTK,jmerkow/VTK,ashray/VTK-EVM,johnkit/vtk-dev,sankhesh/VTK,msmolens/VTK,SimVascular/VTK,sankhesh/VTK,sankhesh/VTK,ashray/VTK-EVM,sankhesh/VTK,keithroe/vtkoptix,SimVascular/VTK,ashray/VTK-EVM,gram526/VTK,jmerkow/VTK,demarle/VTK,gram526/VTK,mspark93/VTK,candy7393/VTK,jmerkow/VTK,ashray/VTK-EVM,sumedhasingla/VTK,candy7393/VTK,gram526/VTK,hendradarwin/VTK,SimVascular/VTK,sumedhasingla/VTK,keithroe/vtkoptix,SimVascular/VTK,demarle/VTK,keithroe/vtkoptix,msmolens/VTK,demarle/VTK,keithroe/vtkoptix,sumedhasingla/VTK,msmolens/VTK,johnkit/vtk-dev,SimVascular/VTK,keithroe/vtkoptix,sumedhasingla/VTK,sankhesh/VTK,msmolens/VTK,sankhesh/VTK,ashray/VTK-EVM,keithroe/vtkoptix,sankhesh/VTK,johnkit/vtk-dev,gram526/VTK,gram526/VTK,ashray/VTK-EVM,msmolens/VTK,johnkit/vtk-dev,keithroe/vtkoptix,hendradarwin/VTK,mspark93/VTK,mspark93/VTK,msmolens/VTK,ashray/VTK-EVM,msmolens/VTK,candy7393/VTK,mspark93/VTK,SimVascular/VTK,hendradarwin/VTK,gram526/VTK,sumedhasingla/VTK,johnkit/vtk-dev,jmerkow/VTK,sankhesh/VTK,demarle/VTK,candy7393/VTK,johnkit/vtk-dev,keithroe/vtkoptix,jmerkow/VTK,demarle/VTK,jmerkow/VTK,sumedhasingla/VTK,hendradarwin/VTK