`default_get` is bad m'kay?
Reproduce:
* Accounting > Configuration > Taxes > Create
* Just add a name, save.
There are no repartition lines, but there should be at least one line
for the base line.
This happens because `default_get` was only computing the main field
`repartition_line_ids` and it was allowed because the contraint was not
checking that same field.
closesodoo/odoo#129840
X-original-commit: f05457c82af63358c292350ef110f0b18c27f164
Signed-off-by: Brice Bartoletti (bib) <bib@odoo.com>
william-andre
6a2f9a49fd