Modifie modèles identite/Admission. Modernise code et tests unitaires.

app/models/__init__.py

app/models/departements.py

app/models/etudiants.py

app/scodoc/TrivialFormulator.py

app/scodoc/notesdb.py

app/scodoc/sco_etud.py

app/scodoc/sco_import_etuds.py

app/scodoc/sco_prepajury.py

app/scodoc/sco_report_but.py

app/scodoc/sco_synchro_etuds.py

app/scodoc/sco_utils.py

app/tables/recap.py

app/views/scolar.py

migrations/versions/497ba81343f7_identite_admission.py

tests/unit/sco_fake_gen.py

tests/unit/test_assiduites.py

tests/unit/test_departements.py

tests/unit/test_sco_basic.py

tools/fakedatabase/create_test_api_database.py

tools/format_import_etudiants.txt