HIVE-6715 : Hive JDBC should include username into open session request for non-sasl connection (Prasad Mujumdar, reviewed by Vaibhav Gumashta, Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1632420 13f79535-47bb-0310-9956-ffa450edef68