[FIX] account_analytic_plan_required: do not override constraints
[FIX] account_analytic_plan_required: do not override constraints

Constraints are added by inherited classes, they do
not replace parent class constraints.

Antiun/account-analytic,acsone/account-analytic,pedrobaeza/account-analytic,ddico/account-analytic,Noviat/account-analytic,NL66278/account-analytic,damdam-s/account-analytic,Endika/account-analytic,charbeljc/account-analytic,hbrunn/account-analytic