vtkModuleTesting: fail Python tests on deprecation warnings

Ben Boeckelrequested to merge
ben.boeckel/vtk:numpy-test-deprecation into master

This should avoid problems like the numpy.int deprecation going ignored for so long.

Cc: @banesullivan
Backport: release:HEAD^2
Backport: paraview/release

Edited by Ben Boeckel

Merge request reports