mpi4py: Suppress warnings in third-party code
mpi4py: Suppress warnings in third-party code

Use vtk_third_party_warning_suppress to disable warnings when compiling
third-party C code in the mpi4py module.  Without this, there may be
many warnings with -Wunused-parameter.  To avoid modifying third-party
code, simply suppress them.

Change-Id: I216f8dae9e9001d22d5c5dd06aeb597e48baf836

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