SOLR-5906: Collection create API ignores property.instanceDir parameter

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1581341 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5903: SolrCore implements Closeable

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1581360 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5783: harden tests

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1581398 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5553: IndexReader#ReaderClosedListener is not always called on IndexReader#close()

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1581400 13f79535-47bb-0310-9956-ffa450edef68