LUCENE-5330: add test

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1539317 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5330: Fix IndexWriter to process all internal events on getReader / close / rollback

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1539332 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5318: create HTTP API command doesn't respect transient core property

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1539343 13f79535-47bb-0310-9956-ffa450edef68