OAK-2117 - Reindex removes all nodes under index definition node

Merged 1627052


git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/branches/1.0@1635715 13f79535-47bb-0310-9956-ffa450edef68
OAK-2168 - Make SolrIndex implement AdvanceQueryIndex

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/branches/1.0@1635716 13f79535-47bb-0310-9956-ffa450edef68