move out findSpecialiseValueList method to have it on the class (she is usefull for class wich inherite of TradeCondition).
Change a bit it to accept portal_type_list parameter to be able to have inheritance tree of another portal_type thant caller (ie. 'Business Process' in 'Pay Sheet Model')
Change also getTradeModelLineComposedList to accept portal_type_list parameter for the same reasons


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27314 20353a03-c40f-0410-a6d1-a30d3c3de9de