Fedora Commons Code

merge of feature branch dev-148146 (Atom Zip Export)

Update to branch log for dev-149292

Move comments into datastream content to allow editing in Admin client and indexing in resource index.

Modify ValidationObject to use relation.predicate when looking for a particular relation.
Modify ObjectValidator to use Constants.MODEL.HAS_MODEL.uri instead of a local constant.

minor correction

added rels-ext format

Minor format updates

Added METS 1.0 and Atom Zip format options for ingest and export

Makes system objects read-only.

Pre-ingesting system content model objects.
This also:
- Fixes DOTranslationUtility's static initializer so that it
doesn't attempt to get configuration from the server instance
(which may not be available), but instead gets it from
fedora.fcfg.
- Relaxes RELSExtValidator so that it doesn't disallow
self-referential relationships (necessary because ContentModel-3.0
has itself as a content model). There has never been
a danger to having self-referential relationships, so this
is kind of a bogus rule anyway.
Todo:
- Refine system content model objects
(in particular, consider FORMAT_URI requirements
and demo objects and migration utility...)
- Add logic to disallow edits to these objects
- Add testing
- Make sure rebuilder works as expected