Made the label tests pass again!
Made the label tests pass again!

They were moved from vtkRenderingOpenGL, and they obviously relied
on the vtkRenderingFreeTypeOpenGL overrides to produce the expected
baseline image.

Change-Id: Ic6b33f314a308204a2125d5bc84f3ca056b76b9b

SimVascular/VTK,demarle/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,SimVascular/VTK,demarle/VTK,msmolens/VTK,sumedhasingla/VTK,keithroe/vtkoptix,jmerkow/VTK,msmolens/VTK,ashray/VTK-EVM,sankhesh/VTK,keithroe/vtkoptix,johnkit/vtk-dev,sumedhasingla/VTK,berendkleinhaneveld/VTK,jmerkow/VTK,gram526/VTK,candy7393/VTK,SimVascular/VTK,candy7393/VTK,demarle/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,demarle/VTK,sumedhasingla/VTK,berendkleinhaneveld/VTK,jmerkow/VTK,gram526/VTK,mspark93/VTK,keithroe/vtkoptix,johnkit/vtk-dev,gram526/VTK,sankhesh/VTK,msmolens/VTK,sankhesh/VTK,SimVascular/VTK,hendradarwin/VTK,msmolens/VTK,msmolens/VTK,candy7393/VTK,johnkit/vtk-dev,demarle/VTK,msmolens/VTK,msmolens/VTK,gram526/VTK,sankhesh/VTK,hendradarwin/VTK,mspark93/VTK,johnkit/vtk-dev,demarle/VTK,ashray/VTK-EVM,sumedhasingla/VTK,gram526/VTK,johnkit/vtk-dev,hendradarwin/VTK,mspark93/VTK,jmerkow/VTK,jmerkow/VTK,sankhesh/VTK,mspark93/VTK,hendradarwin/VTK,mspark93/VTK,ashray/VTK-EVM,sankhesh/VTK,sumedhasingla/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,sankhesh/VTK,hendradarwin/VTK,jmerkow/VTK,jmerkow/VTK,candy7393/VTK,SimVascular/VTK,sankhesh/VTK,gram526/VTK,SimVascular/VTK,ashray/VTK-EVM,ashray/VTK-EVM,sumedhasingla/VTK,msmolens/VTK,mspark93/VTK,keithroe/vtkoptix,jmerkow/VTK,demarle/VTK,johnkit/vtk-dev,candy7393/VTK,candy7393/VTK,sumedhasingla/VTK,sumedhasingla/VTK,mspark93/VTK,ashray/VTK-EVM,demarle/VTK,ashray/VTK-EVM,ashray/VTK-EVM,berendkleinhaneveld/VTK,johnkit/vtk-dev,hendradarwin/VTK,berendkleinhaneveld/VTK,keithroe/vtkoptix,gram526/VTK,gram526/VTK,candy7393/VTK,SimVascular/VTK,candy7393/VTK,mspark93/VTK,keithroe/vtkoptix