vtkModuleTesting: fail Python tests on deprecation warnings
This should avoid problems like the numpy.int deprecation going
ignored for so long.
Accidentally dropped from !9788 (merged) when making it work for backports.
Edited by Ben Boeckel
This should avoid problems like the numpy.int deprecation going
ignored for so long.
Accidentally dropped from !9788 (merged) when making it work for backports.