ZOOKEEPER-1984. testLeaderTimesoutOnNewQuorum is a flakey test (Alex Shraer via phunt)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/trunk@1612867 13f79535-47bb-0310-9956-ffa450edef68
ZOOKEEPER-1789. 3.4.x observer causes NPE on 3.5.0 (trunk) participants (Alex Shraer via phunt)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/trunk@1612885 13f79535-47bb-0310-9956-ffa450edef68
ZOOKEEPER-1982. Refactor (touch|add)Session in SessionTrackerImpl.java (Hongchao Deng via phunt)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/trunk@1612906 13f79535-47bb-0310-9956-ffa450edef68