OAK-1976 - SecurityProvider is not able to add Custom PrincipalConfiguration in CompositePrincipalConfiguration in OSGI Mode

Merging from trunk 1614835


git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/branches/1.0@1614836 13f79535-47bb-0310-9956-ffa450edef68