JCRVLT-66 Updating an exiting authorizable does not work if on different path (mode=merge)
JCRVLT-67 rep:authorizableId might be removed on package install causing error in oak

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/commons/filevault/trunk@1634753 13f79535-47bb-0310-9956-ffa450edef68