Upgrade to active-fedora 9.0.0.beta5
Cherry pick collection spec changes from 3.0-stable

Conflicts:
	app/models/concerns/hydra/collection.rb
	app/models/datastreams/hydra/collection_rdf_datastream.rb
	hydra-collections.gemspec
	spec/models/collection_spec.rb
Upgrade to active-fedora 9.0.0.beta5