Adding missing method which is required to handle BPM build

git-svn-id: https://svn.erp5.org/repos/public/erp5/sandbox/amount_generator@37565 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/mixin/builder.py

@@ -158,6 +158,11 @@ class BuilderMixin(XMLObject, Amount, Predicate):
     # XXX Returning the delivery list is probably not necessary
     return delivery_list
 
+  def getRelatedBusinessLinkValueList(self):
+    return self.getDeliveryBuilderRelatedValueList(
+        portal_type='Business Link') + self.getOrderBuilderRelatedValueList(
+        portal_type='Business Link')
+
   def callBeforeBuildingScript(self):
     """
       Call a script on the module, for example, to remove some