HIVE-8173: HiveServer2 dynamic service discovery: figure out best ZooKeeper ACLs for security (Vaibhav Gumashta reviewed by Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1633058 13f79535-47bb-0310-9956-ffa450edef68