Convert old unit test to url type

[TwinGan]

1. tests/test_a_pmv.py
2. tests/test_adaptive_ashrae.py
3. tests/test_adaptive_en.py
4. tests/test_ankle_draft.py
5. tests/test_solar_gain.py
6. tests/test_two_nodes.py
7. tests/test_vertical_tmp_grad_ppd.py

@FedericoTartarini Professor, please review the code.