SOLR-4623: When serializing similarity factories, don't reduce class names of Similarity's wrapped with the anonymous factory to 'solr.<SimpleClassName>'; also, only reduce the class name of sim factories located in the org.apache.solr.search.similarities package, rather than that of any sim factory under packages org.apache.lucene.** and org.apache.solr.**
lucene/dev/trunk/solr/core/src/java/org/apache/solr/schema/SimilarityFactory.java