[FIX] account: refunds are valid outstanding debits/credits that we can add on bills/invoices.
[FIX] account: refunds are valid outstanding debits/credits that we can add on bills/invoices.

sysadminmatmoz/OCB,hip-odoo/odoo,sysadminmatmoz/OCB,bplancher/odoo,laslabs/odoo,sysadminmatmoz/OCB,dfang/odoo,laslabs/odoo,microcom/odoo,dfang/odoo,bplancher/odoo,sysadminmatmoz/OCB,dfang/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB,storm-computers/odoo,ygol/odoo,ygol/odoo,ygol/odoo,microcom/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,bplancher/odoo,stephen144/odoo,storm-computers/odoo,storm-computers/odoo,dfang/odoo,storm-computers/odoo,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB,microcom/odoo,bplancher/odoo,hip-odoo/odoo,stephen144/odoo,laslabs/odoo,stephen144/odoo,Elico-Corp/odoo_OCB,stephen144/odoo,stephen144/odoo,ygol/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo,microcom/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,stephen144/odoo,microcom/odoo,microcom/odoo,laslabs/odoo,dfang/odoo,ygol/odoo,storm-computers/odoo,bplancher/odoo,storm-computers/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,hip-odoo/odoo,ygol/odoo,bplancher/odoo,laslabs/odoo