Add a Manager proxy role on Base_checkBaobabSourceAndDestination: as it only accesses context (and its subobjects), and as no security should be defined on subobjects, it means caller rights were already checked.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@31241 20353a03-c40f-0410-a6d1-a30d3c3de9de