BOOKKEEPER-657: Journal Improvement (Robin Dhamankar via sijie)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/bookkeeper/trunk@1531494 13f79535-47bb-0310-9956-ffa450edef68
BOOKKEEPER-657: Journal Improvement (Robin Dhamankar via sijie) (add missing file)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/bookkeeper/trunk@1531495 13f79535-47bb-0310-9956-ffa450edef68