Fix for opengl es edl lighting
Fix for opengl es edl lighting

Forgot that es does not have glClearDepth

SimVascular/VTK,keithroe/vtkoptix,sankhesh/VTK,sankhesh/VTK,sankhesh/VTK,keithroe/vtkoptix,SimVascular/VTK,sankhesh/VTK,sumedhasingla/VTK,keithroe/vtkoptix,SimVascular/VTK,SimVascular/VTK,keithroe/vtkoptix,sumedhasingla/VTK,sumedhasingla/VTK,SimVascular/VTK,keithroe/vtkoptix,sumedhasingla/VTK,SimVascular/VTK,sankhesh/VTK,keithroe/vtkoptix,keithroe/vtkoptix,sumedhasingla/VTK,sumedhasingla/VTK,keithroe/vtkoptix,sankhesh/VTK,sankhesh/VTK,sumedhasingla/VTK,sankhesh/VTK,SimVascular/VTK,SimVascular/VTK,sumedhasingla/VTK