[FIX] hr_timesheet: generate AA when allowing timesheet
[FIX] hr_timesheet: generate AA when allowing timesheet

During the super of write, a check constraint is done
in python. So, if writing allow_timesheet=True the constraint
will raise is no AA is set on the project.
This commit restore the exepected behavior.

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