OAK-1401 Move AbstractLazyIterator to o.a.j.commons.iterator (jackrabbit/jcr-commons)
 - copied class to jackrabbit/jcr-commons



git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/trunk@1565601 13f79535-47bb-0310-9956-ffa450edef68