Add back in Tomviz Python directory install
Add back in Tomviz Python directory install

It isn't clear why the install directory for lib isn't bringing in
Tomviz, but the Tomviz directory was missing, so giving this a try.

Signed-off-by: Marcus D. Hanwell <cf7042e2e8eee958b5bcde1ae2cbefef82efc184@kitware.com>

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