[FIX] account: use 'journal' instead of 'self' in _methods_compute
[FIX] account: use 'journal' instead of 'self' in _methods_compute

Using 'self' triggers a ValueError: Expected singleton

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