Added support for absolute payment date

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5619 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/PropertySheet/PaymentCondition.py

@@ -45,6 +45,10 @@ class PaymentCondition:
             'description' : 'payment term in a number of days',
             'type'        : 'int',
             'mode'        : 'w' },
+        {   'id'          : 'payment_date',
+            'description' : 'An absolute payment date',
+            'type'        : 'date',
+            'mode'        : 'w' },
         {   'id'          : 'payment_end_of_month',
             'description' : 'is the payment required on the end of month',
             'type'        : 'boolean',