SOLR-5448: ShowFileRequestHandler treats everything as Directory, when in Cloud-Mode

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1542436 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5447: Add a QParserPlugin for Lucene's SimpleQueryParser

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1542486 13f79535-47bb-0310-9956-ffa450edef68