COMP: Use libxml2 library cmake variable instead of hardcoding it to the libxml2 included in VTK.
COMP: Use libxml2 library cmake variable instead of hardcoding it to the libxml2 included in VTK.

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