sampled reduced error when running inside new container

[Paulie14]

With new image flow123d/endorse_ci:a785dd, I run collect_hdf.py and received assert on sampled_reduced.hdf
I do not know why.

python3 collect_hdf.py /storage/liberec3-tul/home/pavel_exner/workspace/endorse-experiment/tests/sandbox/240206_1132_3d_model_D03
Skip sampled_collected.h5 = collect.
Skip sampled_fixed.h5 = get_completed_groups.
Execute sampled_reduced.h5 = reduced_dataset  ...Input dset shape:  (3072, 42, 31186)
Output dset shape:  [144, 10, 31186]
Traceback (most recent call last):
  File "/auto/liberec3-tul/home/pavel_exner/workspace/endorse-experiment/tests/Bukov2/collect_hdf.py", line 240, in <module>
    main(workdir)     
  File "/auto/liberec3-tul/home/pavel_exner/workspace/endorse-experiment/tests/Bukov2/collect_hdf.py", line 235, in main
    reduced_dataset(workdir, fixed)    
  File "/auto/liberec3-tul/home/pavel_exner/workspace/endorse-experiment/src/endorse/Bukov2/bukov_common.py", line 195, in wrapper
    raise e
  File "/auto/liberec3-tul/home/pavel_exner/workspace/endorse-experiment/src/endorse/Bukov2/bukov_common.py", line 190, in wrapper
    assert val == tmp_fname
AssertionError