HIVE-4763: add support for thrift over http transport in HS2 (Vaibhav Gumashta and Mike Liddell  via Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1526744 13f79535-47bb-0310-9956-ffa450edef68