I've looked a lot of places and finding only pre-Hbase 1.0 code.
This is connecting to a kerberos cluster with java api.
https://community.hortonworks.com/articles/234/securing-hdp-23-with-apache-ranger.html has some examples from hbase shell
and not webHbase through Knox, native HBase API, I have a valid Kerberos ticket in a ugi
This question doesn't seem to have anything to do with ranger or knox.