HeaderTest: Exclude vtkMFCWindow.h from header testing
HeaderTest: Exclude vtkMFCWindow.h from header testing

It declares an MFC derived class, not a VTK derived class.
So some of the checks of the header test are irrelevant.

Change-Id: Id378400b0e4f7c14d4562be406f2c16e2b1dd310

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