OAK-2072 Lucene: inconsistent usage of the config option persistence

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1635491 13f79535-47bb-0310-9956-ffa450edef68
OAK-2245 : UserImporter should always set the rep:authorizableID


git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1635494 13f79535-47bb-0310-9956-ffa450edef68