AMBARI-7613. Ambari installs wrong zookeeper_client_jaas.conf file. (aonishuk)

ambari-server/src/main/resources/stacks/HDP/2.0.6/services/ZOOKEEPER/package/templates/zookeeper_client_jaas.conf.j2

@@ -20,5 +20,4 @@ Client {
 com.sun.security.auth.module.Krb5LoginModule required
 useKeyTab=false
 useTicketCache=true;
-principal="{{zk_principal}}";
 };