remove references to getDirectory methods from FSDirectory javadocs since we've deprecated them
remove references to getDirectory methods from FSDirectory javadocs since we've deprecated them

git-svn-id: 4c5078813df38efa56971a28e09a55254294f104@751276 13f79535-47bb-0310-9956-ffa450edef68

tokee/lucene,tokee/lucene,tokee/lucene,tokee/lucene