Getting all specs to pass against Rails 4 curate:

* This involved removing #attr_accessible
* Adding strong parameters where applicable
* Removing reference to Rails.configuration in place of
  Curate.configuration; This reflects that Curate is a hybrid-engine
  (neither mounted nor full)
* Adjusting specs to reflect default visibility
* Pointing to localized git repositories
* Adding a SolrDocument - The curate gem no longer provides one, and
  this meant the Sufia::SolrDocumentBehavior was not being loaded, so
  SolrDocument#noid didn't exist.

Downside: the tests now take twice as long. This is a function of
the User creation callbacks.