Getting rid of some typos

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr5473@1593977 13f79535-47bb-0310-9956-ffa450edef68
 Getting rid of some typos

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr5473@1593978 13f79535-47bb-0310-9956-ffa450edef68