ENH: Accept user-supplied MultiProcessController
ENH: Accept user-supplied MultiProcessController

Added funtionality s.t. the connectivity filter can
accept a user-supplied multi-process controller for
the inter-process communication.

collects/VTK,msmolens/VTK,jmerkow/VTK,cjh1/VTK,gram526/VTK,berendkleinhaneveld/VTK,cjh1/VTK,sankhesh/VTK,sankhesh/VTK,mspark93/VTK,johnkit/vtk-dev,sankhesh/VTK,keithroe/vtkoptix,sumedhasingla/VTK,johnkit/vtk-dev,SimVascular/VTK,hendradarwin/VTK,demarle/VTK,SimVascular/VTK,aashish24/VTK-old,ashray/VTK-EVM,sankhesh/VTK,gram526/VTK,berendkleinhaneveld/VTK,candy7393/VTK,sumedhasingla/VTK,jmerkow/VTK,candy7393/VTK,biddisco/VTK,mspark93/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,mspark93/VTK,biddisco/VTK,cjh1/VTK,berendkleinhaneveld/VTK,ashray/VTK-EVM,gram526/VTK,ashray/VTK-EVM,candy7393/VTK,mspark93/VTK,collects/VTK,aashish24/VTK-old,mspark93/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,msmolens/VTK,cjh1/VTK,sankhesh/VTK,gram526/VTK,collects/VTK,candy7393/VTK,johnkit/vtk-dev,keithroe/vtkoptix,hendradarwin/VTK,jmerkow/VTK,ashray/VTK-EVM,mspark93/VTK,sumedhasingla/VTK,keithroe/vtkoptix,keithroe/vtkoptix,hendradarwin/VTK,mspark93/VTK,keithroe/vtkoptix,SimVascular/VTK,gram526/VTK,sankhesh/VTK,msmolens/VTK,keithroe/vtkoptix,hendradarwin/VTK,SimVascular/VTK,aashish24/VTK-old,ashray/VTK-EVM,candy7393/VTK,biddisco/VTK,SimVascular/VTK,sumedhasingla/VTK,biddisco/VTK,demarle/VTK,ashray/VTK-EVM,sankhesh/VTK,gram526/VTK,hendradarwin/VTK,aashish24/VTK-old,sumedhasingla/VTK,keithroe/vtkoptix,sumedhasingla/VTK,demarle/VTK,hendradarwin/VTK,SimVascular/VTK,msmolens/VTK,jmerkow/VTK,sumedhasingla/VTK,candy7393/VTK,candy7393/VTK,demarle/VTK,cjh1/VTK,cjh1/VTK,candy7393/VTK,biddisco/VTK,jmerkow/VTK,jmerkow/VTK,hendradarwin/VTK,gram526/VTK,msmolens/VTK,johnkit/vtk-dev,johnkit/vtk-dev,msmolens/VTK,jmerkow/VTK,johnkit/vtk-dev,keithroe/vtkoptix,berendkleinhaneveld/VTK,collects/VTK,aashish24/VTK-old,berendkleinhaneveld/VTK,msmolens/VTK,gram526/VTK,demarle/VTK,biddisco/VTK,msmolens/VTK,biddisco/VTK,collects/VTK,mspark93/VTK,demarle/VTK,collects/VTK,jmerkow/VTK,demarle/VTK,ashray/VTK-EVM,SimVascular/VTK,sankhesh/VTK,ashray/VTK-EVM,sumedhasingla/VTK,aashish24/VTK-old,demarle/VTK