Branch for solr5914

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr5914@1582248 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5914: Merge branch up to trunk, make all tests pass, make some other improvements and small changes.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr5914@1582571 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5914: Fix map-reduce contrib tests use of solrhome.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr5914@1582575 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5914: Fix morphlines contrib tests use of solrhome.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr5914@1582577 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5914: Need to use ensureClosed boolean everywhere in SolrTestCaseJ4.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr5914@1582826 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5914: Polish up createTempDir calls.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/solr5914@1583163 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-2446: add checksums to index files

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1583550 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-2446: ensure we close file if we hit exception writing codec header

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1583565 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5488: Fix up test failures for Analytics Component. Runs clean locally.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1583636 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5880: Fix test failure when n=1. Make it at least 2.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1583721 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5795: New DocExpirationUpdateProcessorFactory supports computing an expiration date for documents from the TTL expression, as well as automatically deleting expired documents on a periodic basis

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1583734 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5829: Allow ExpandComponent to accept query and filter query parameters

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1583802 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5859 Harden Overseer restart

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1584069 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5943: SolrCmdDistributor does not distribute the openSearcher parameter

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1584083 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5795: harden leader check to log cleanly (no NPE) in transient situations when there is no leader due to election in progress

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1584097 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5859: add OCP.getCollectionStatus() param description for 'clusterState' to stop 'ant precommit' bitching 'Javadoc: Description expected after this reference' and failing the build

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1584108 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5859 removing accidental removal of SOLR-5908 changes

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1584115 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5563: remove sep layout

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1584140 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5654: Create a synonym filter factory that is (re)configurable, and capable of reporting its configuration, via REST API

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1584211 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5951: Fixed SolrDispatchFilter to throw useful exception on startup if SLF4j logging jars are missing

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1584213 13f79535-47bb-0310-9956-ffa450edef68