LUCENE-5919: backport to 4.9.x

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_9@1625412 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5922: backport to 4.9.x

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_9@1625413 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5843: backport to 4.9.x

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_9@1625415 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5844: backport to 4.9.1

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_9@1625417 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5827: backport to 4.9.x

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_9@1625422 13f79535-47bb-0310-9956-ffa450edef68