[PA-A] add new model exe file and updated input files.

BayesValidRox/tests/PA-A/model_exe.py

BayesValidRox/tests/PA-A/models/stokes/averaging.py

...ValidRox/tests/PA-A/models/stokes/ffpm_stokes_p_final.csv

...x/tests/PA-A/models/stokes/ffpm_stokes_velocity_final.csv

BayesValidRox/tests/PA-A/models/stokes/model_stokes_exe.py

.../tests/PA-A/models/stokesdarcy/averagedPressureValues.csv

.../tests/PA-A/models/stokesdarcy/averagedVelocityValues.csv

...ox/tests/PA-A/models/stokesdarcy/averaging_stokesdarcy.py

...tests/PA-A/models/stokesdarcy/stokesdarcy_BJ_params.input

...tests/PA-A/models/stokesdarcy/stokesdarcy_ER_params.input

...lidRox/tests/PA-A/models/stokespnm/averaging_stokespnm.py

...lidRox/tests/PA-A/models/stokespnm/stokespnm_params.input

BayesValidRox/tests/PA-A/ref_stokesdarcy.py

BayesValidRox/tests/PA-A/ref_stokespnm.py

BayesValidRox/tests/PA-A/stokesdarcy_BJ_params.tpl.input

BayesValidRox/tests/PA-A/stokesdarcy_ER_params.tpl.input

BayesValidRox/tests/PA-A/stokespnm_params.tpl.input

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

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