tests: use filesystem dir until I figure out why ephemerals dirs are having trouble

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1457134 13f79535-47bb-0310-9956-ffa450edef68
SOLR-4311: Admin UI - Optimize Caching Behaviour

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1457143 13f79535-47bb-0310-9956-ffa450edef68