fix oldroydb test skip

10 jobs for oldroydb in 49 minutes and 9 seconds (queued for 2 seconds)
Name Stage Failure
failed
minimal-windows Test
36.86s call     lbmpy_tests/full_scenarios/schaefer_turek/scenario_schaefer_turek.py::test_schaefer_turek
35.41s call lbmpy_tests/test_central_moment_transform.py::test_forward_transform[Stencil.D3Q15-polynomial]
32.68s call lbmpy_tests/test_split_optimization.py::test_equivalence_short[setup1]
32.33s call lbmpy_tests/test_central_moment_transform.py::test_backward_transform[Stencil.D3Q15-monomial]
=========================== short test summary info ===========================
FAILED lbmpy_tests/full_scenarios/square_channel/scenario_square_channel.py::test_square_channel
====== 1 failed, 564 passed, 25 skipped, 4 warnings in 902.16s (0:15:02) ======
Cleaning up project directory and file based variables
ERROR: Job failed: Process exited with status 1