VTK-2668 - disable worker until can figure out what goes wrong with sporadic canvas image data beeing corrupted IO from worker
VTK-2668 - disable worker until can figure out what goes wrong with sporadic canvas image data beeing corrupted IO from worker

vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk,vtkio/vtk