[FIX] models.py: onchange in python2 with 2054b59
[FIX] models.py: onchange in python2 with 2054b59

Without the call to `super`, with at least two level off expected
onchange return data (eg. `invoice_lines.name`) we have an error in
python2, python3 python implementation of OrderedDict and possibly other
python implementation.

So this worked most often (with python3 CPython C implementation of
OrderedDict) by chance.

closes #25960

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo