Test out ogl2 as the default for buildbot systems
Test out ogl2 as the default for buildbot systems

jmerkow/VTK,gram526/VTK,msmolens/VTK,sumedhasingla/VTK,msmolens/VTK,candy7393/VTK,sankhesh/VTK,sumedhasingla/VTK,demarle/VTK,demarle/VTK,gram526/VTK,jmerkow/VTK,keithroe/vtkoptix,keithroe/vtkoptix,demarle/VTK,sankhesh/VTK,mspark93/VTK,sumedhasingla/VTK,candy7393/VTK,msmolens/VTK,msmolens/VTK,keithroe/vtkoptix,mspark93/VTK,msmolens/VTK,candy7393/VTK,candy7393/VTK,gram526/VTK,jmerkow/VTK,jmerkow/VTK,sankhesh/VTK,gram526/VTK,gram526/VTK,sankhesh/VTK,mspark93/VTK,jmerkow/VTK,SimVascular/VTK,SimVascular/VTK,mspark93/VTK,keithroe/vtkoptix,sumedhasingla/VTK,sankhesh/VTK,jmerkow/VTK,sankhesh/VTK,sumedhasingla/VTK,SimVascular/VTK,keithroe/vtkoptix,msmolens/VTK,demarle/VTK,mspark93/VTK,mspark93/VTK,mspark93/VTK,candy7393/VTK,SimVascular/VTK,keithroe/vtkoptix,demarle/VTK,demarle/VTK,jmerkow/VTK,sumedhasingla/VTK,demarle/VTK,gram526/VTK,keithroe/vtkoptix,demarle/VTK,gram526/VTK,sumedhasingla/VTK,candy7393/VTK,msmolens/VTK,SimVascular/VTK,candy7393/VTK,sankhesh/VTK,sumedhasingla/VTK,SimVascular/VTK,msmolens/VTK,keithroe/vtkoptix,mspark93/VTK,SimVascular/VTK,sankhesh/VTK,gram526/VTK,jmerkow/VTK,candy7393/VTK,SimVascular/VTK