HIVE-8557 : automatically setup ZooKeeperTokenStore to use kerberos authentication when kerberos is enabled (Thejas Nair, reviewed by Vaibhav Gumashta)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1635356 13f79535-47bb-0310-9956-ffa450edef68