[PA-A] fixed data in post_plot.py

BayesValidRox/tests/PA-A/Benchmark_PAA.py

BayesValidRox/tests/PA-A/ffpm_validation_stokesdarcy.py

BayesValidRox/tests/PA-A/post_plot.py

BayesValidRox/tests/PA-A/util/post_plot_PAPER.py