WIP: Filesystem Document modules compatibility
Fix the issue that very old instances of document classes still using Products.ERP5Type.Document.GeographicAddress.GeographicAddress as __class__ were broken since GeographicAddress is now moved to document component.
And also the issue that even older document classes using Products.ERP5.Document.Account.Account ( not even from the dynamic Products.ERP5Type.Document module but from their "physical" dotted name )