HIVE-20550, we need to make beeline work in secure mode. That means, we need to get a delegation token from hiveserver2, and pass that to beeline. This is similar to HIVE-5133, I make two changes:
1. Make a jdbc connection to hs2, pull delegation token from HiveConnection, and pass along
2. In hive jdbc driver, check for token file in HADOOP_TOKEN_FILE_LOCATION, and extract delegation token if exists
There's one config needed in webhcat-site.xml, to point "templeton.hive.hs2.url" to hive jdbc url.