directly software delivered parts

Thanks to change, that egg list is not shared between software and
instance (which had no sense, as in software it is somehow "caching" of
eggs) installing instance will not trigger rebuilding eggs available as
develop-egg.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@40271 20353a03-c40f-0410-a6d1-a30d3c3de9de