SOLR-5404: The example config references deprecated classes.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1543846 13f79535-47bb-0310-9956-ffa450edef68
improve javadocs

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1543852 13f79535-47bb-0310-9956-ffa450edef68