Bug#1141955: python-pyvista: autopkgtests fail due to changed plot output

[Francesco Ballarin]

Source: python-pyvista
Followup-For: Bug #1141955
Control: notfound -1 0.48.4-3
Control: found -1 0.48.4-2
Control: fixed -1 0.48.4-3

Hi,
this was present in 0.48.4-2 and fixed yesterday evening in 0.48.4-3. I am
hunting down every test failure, it may take a few more uploads to update all
the necessary skips.

Cheers,
Francesco