keep portal_contribution_registry/** in erp5_core that are moved to each business templates.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43355 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/bootstrap/erp5_core/bt/revision

-40882
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+40883
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product/ERP5/bootstrap/erp5_core/bt/template_keep_path_list

+portal_contribution_registry/**