Send threshold to vtkTesting, add interaction support, and return what vtktesting returns
Send threshold to vtkTesting, add interaction support, and return what vtktesting returns

ashray/VTK-EVM,keithroe/vtkoptix,hendradarwin/VTK,SimVascular/VTK,demarle/VTK,collects/VTK,arnaudgelas/VTK,gram526/VTK,spthaolt/VTK,gram526/VTK,msmolens/VTK,spthaolt/VTK,arnaudgelas/VTK,biddisco/VTK,sankhesh/VTK,daviddoria/PointGraphsPhase1,demarle/VTK,mspark93/VTK,arnaudgelas/VTK,aashish24/VTK-old,msmolens/VTK,jmerkow/VTK,gram526/VTK,msmolens/VTK,gram526/VTK,keithroe/vtkoptix,collects/VTK,msmolens/VTK,daviddoria/PointGraphsPhase1,keithroe/vtkoptix,sumedhasingla/VTK,daviddoria/PointGraphsPhase1,berendkleinhaneveld/VTK,mspark93/VTK,hendradarwin/VTK,mspark93/VTK,candy7393/VTK,sumedhasingla/VTK,johnkit/vtk-dev,biddisco/VTK,sankhesh/VTK,sankhesh/VTK,demarle/VTK,jmerkow/VTK,jeffbaumes/jeffbaumes-vtk,demarle/VTK,johnkit/vtk-dev,aashish24/VTK-old,hendradarwin/VTK,naucoin/VTKSlicerWidgets,daviddoria/PointGraphsPhase1,candy7393/VTK,jmerkow/VTK,sgh/vtk,candy7393/VTK,SimVascular/VTK,naucoin/VTKSlicerWidgets,msmolens/VTK,SimVascular/VTK,ashray/VTK-EVM,demarle/VTK,SimVascular/VTK,johnkit/vtk-dev,cjh1/VTK,keithroe/vtkoptix,mspark93/VTK,msmolens/VTK,sumedhasingla/VTK,berendkleinhaneveld/VTK,ashray/VTK-EVM,cjh1/VTK,arnaudgelas/VTK,keithroe/vtkoptix,cjh1/VTK,sankhesh/VTK,collects/VTK,Wuteyan/VTK,daviddoria/PointGraphsPhase1,jeffbaumes/jeffbaumes-vtk,jmerkow/VTK,gram526/VTK,SimVascular/VTK,spthaolt/VTK,Wuteyan/VTK,candy7393/VTK,naucoin/VTKSlicerWidgets,johnkit/vtk-dev,sgh/vtk,daviddoria/PointGraphsPhase1,cjh1/VTK,berendkleinhaneveld/VTK,mspark93/VTK,sgh/vtk,sankhesh/VTK,gram526/VTK,biddisco/VTK,candy7393/VTK,biddisco/VTK,gram526/VTK,spthaolt/VTK,johnkit/vtk-dev,biddisco/VTK,aashish24/VTK-old,hendradarwin/VTK,sankhesh/VTK,ashray/VTK-EVM,jmerkow/VTK,biddisco/VTK,sumedhasingla/VTK,keithroe/vtkoptix,arnaudgelas/VTK,Wuteyan/VTK,demarle/VTK,spthaolt/VTK,mspark93/VTK,jeffbaumes/jeffbaumes-vtk,berendkleinhaneveld/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,sankhesh/VTK,ashray/VTK-EVM,Wuteyan/VTK,ashray/VTK-EVM,keithroe/vtkoptix,cjh1/VTK,mspark93/VTK,Wuteyan/VTK,berendkleinhaneveld/VTK,aashish24/VTK-old,hendradarwin/VTK,demarle/VTK,jeffbaumes/jeffbaumes-vtk,collects/VTK,gram526/VTK,demarle/VTK,spthaolt/VTK,SimVascular/VTK,aashish24/VTK-old,keithroe/vtkoptix,msmolens/VTK,biddisco/VTK,arnaudgelas/VTK,naucoin/VTKSlicerWidgets,johnkit/vtk-dev,jeffbaumes/jeffbaumes-vtk,jmerkow/VTK,Wuteyan/VTK,jmerkow/VTK,sankhesh/VTK,ashray/VTK-EVM,hendradarwin/VTK,ashray/VTK-EVM,SimVascular/VTK,naucoin/VTKSlicerWidgets,johnkit/vtk-dev,candy7393/VTK,sgh/vtk,sgh/vtk,jeffbaumes/jeffbaumes-vtk,candy7393/VTK,sumedhasingla/VTK,mspark93/VTK,collects/VTK,jmerkow/VTK,Wuteyan/VTK,collects/VTK,SimVascular/VTK,sgh/vtk,cjh1/VTK,naucoin/VTKSlicerWidgets,sumedhasingla/VTK,candy7393/VTK,aashish24/VTK-old,sumedhasingla/VTK,msmolens/VTK,spthaolt/VTK