Bringing back support for rectilinear input.
Bringing back support for rectilinear input.

vtkExtractCTHPart in past support a vtkRectilinearGrid as input. Commit 323ad383
resulted in that ability being lost. Fixed that. Also fixing the defaults for
the newly added filter parameters to match the old version.

Change-Id: Ie163572ea34d89564feff57f40f4e58c099a0100

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