- add test to testBPMCore.py proving that changing resource will reexpannd properly
 - in TradeModelRule.py and TradeCondition.py use reference to compare documents, and set reference property on documents, as resource is not stable enough


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27727 20353a03-c40f-0410-a6d1-a30d3c3de9de