SOLR-1478: use _docid_ to sort by the lucene docid
SOLR-1478: use _docid_ to sort by the lucene docid

git-svn-id: 3b1ff1236863b4d63a22e4dae568675c2e247730@823199 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr