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 (merged trunk r1650328)
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 (merged trunk r1650328)

git-svn-id: e799fff536a883f3c27ef733fe770373e8a19271@1650335 13f79535-47bb-0310-9956-ffa450edef68

PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr