ZOOKEEPER-1973. Jetty Server changes broke ibm6 support (Bill Havanki via phunt)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/trunk@1612359 13f79535-47bb-0310-9956-ffa450edef68
ZOOKEEPER-1975. Turn off "internationalization warnings" in findbugs exclude file (phunt)

git-svn-id: https://svn.apache.org/repos/asf/zookeeper/trunk@1612362 13f79535-47bb-0310-9956-ffa450edef68
fix concurrent atomic
fix Performance Warnings
dodgy
zk-1907:improve thread