SOLR-6024: Fix StatsComponent when using docValues=true multiValued=true (merge r1622386, and DocValuesStats.java specific changes from r1594441, r1594445, r1595259, r1600688, r1602997)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1622525 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6297: Fix for Distributed WordBreakSolrSpellChecker

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1622526 13f79535-47bb-0310-9956-ffa450edef68