BOOKKEEPER-709: SlowBookieTest#testSlowBookie fails intermittently (Rakesh R via fpj)



git-svn-id: https://svn.apache.org/repos/asf/zookeeper/bookkeeper/trunk@1555158 13f79535-47bb-0310-9956-ffa450edef68
BOOKKEEPER-714: Logging channel exceptions in PerChannelBookieClient (sijie)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/bookkeeper/trunk@1556732 13f79535-47bb-0310-9956-ffa450edef68