Description
background info: http://mail-archives.apache.org/mod_mbox/lucene-dev/201511.mbox/%3Calpine.DEB.2.11.1511231128450.24330@tray%3E
A commit that added a package to solrj which already existed in solr-core caused the javadoc link checker to uncover at least 4 instances of private or package-private classes being neccessary to use public APIs.
we should fix these instances and any other instances of APIs with similar problems that we can find.