SOLR-5709: Highlighting grouped duplicate docs from different shards with group.limit > 1 throws ArrayIndexOutOfBoundsException (merged trunk r1566743)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1566746 13f79535-47bb-0310-9956-ffa450edef68