OAK-2024 fix test case

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1617701 13f79535-47bb-0310-9956-ffa450edef68
remove unused imports

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1617703 13f79535-47bb-0310-9956-ffa450edef68