Refactoring: cursus Classic/ECTS/BUT

app/but/cursus_but.py

app/models/validations.py

app/scodoc/notes_table.py

app/scodoc/sco_apogee_csv.py

app/scodoc/sco_cache.py

app/scodoc/sco_cursus.py

app/scodoc/sco_cursus_dut.py

app/scodoc/sco_edit_ue.py

app/scodoc/sco_formsemestre_edit.py

app/scodoc/sco_formsemestre_exterieurs.py

app/scodoc/sco_formsemestre_validation.py

app/scodoc/sco_groups.py

app/scodoc/sco_groups_view.py

app/scodoc/sco_moduleimpl_status.py

app/scodoc/sco_page_etud.py

app/scodoc/sco_permissions_check.py

app/scodoc/sco_prepajury.py

app/scodoc/sco_pvjury.py

app/scodoc/sco_pvpdf.py

app/scodoc/sco_report.py