Refs #3929; fix migration of migrated Naaya File to Naaya BFile

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs/naaya.content.bfile@21298 a0171fae-0946-0410-966d-b1775066cd26
Bump egg to development

git-svn-id: https://svn.eionet.europa.eu/repositories/Naaya/trunk/eggs/naaya.content.bfile@21299 a0171fae-0946-0410-966d-b1775066cd26