SOLR-5499: Added a warning note in example solrconfig.xml against removing realtime get handler

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1546776 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5509: Raise id's per thread so they won't overlap

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1546779 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5023: Add support for deleteInstanceDir to be passed from SolrJ for Core Unload action

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1546793 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5023: Add attribution to issue reporter

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1546795 13f79535-47bb-0310-9956-ffa450edef68