SOLR-4839: Set Jetty 9's new option to persist its temp directory (persistTempDirectory) - where the war is exploded - to true, so that the server/solr-webapp/ directory doesn't get deleted when Jetty shuts down gracefully
SOLR-4839: Set Jetty 9's new option to persist its temp directory (persistTempDirectory) - where the war is exploded - to true, so that the server/solr-webapp/ directory doesn't get deleted when Jetty shuts down gracefully

git-svn-id: 308d55f399f3bd9aa0560a10e81a003040006c48@1650328 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr