OAK-325: QueryEngine can't handle node type hierarchies

Fix type handling when reindexing

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1471310 13f79535-47bb-0310-9956-ffa450edef68
minor improvement

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1471311 13f79535-47bb-0310-9956-ffa450edef68