ENH:Added picking regression test
ENH:Added picking regression test

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