Disable paraview's embedded documentation
Disable paraview's embedded documentation

Tomviz doesn't use this documentation and the superbuild often fails
with it enabled unless the path to the qhelpgenerator executable is
manually specified.

cjh1/tomviz-superbuild,mathturtle/tomviz-superbuild,OpenChemistry/tomviz-superbuild,cjh1/tomviz-superbuild,mathturtle/tomviz-superbuild,OpenChemistry/tomviz-superbuild