Cleanup vtkPVPythonCatalyst build issues.

After changes to VTKConfig.cmake, cleaning up vtkPVPythonCatalyst module to be
added explicitly at the end of the vtkModuleTop.cmake.

Change-Id: I517e58d1837637083da32c5c6ce6f907134995d2
Update VTK:

Change-Id: I8ef0cacfcb783ec68df810bf5f4876442f3b66c5
Merge topic 'catalyst_2.0' into next

8a84ba0 Update VTK:
38e5604 Cleanup vtkPVPythonCatalyst build issues.