HIVE-8288: HiveServer2 dynamic discovery should create znodes organized by version number & add support for removing server uri's of a particular version from the server script. (Vaibhav Gumashta reviewed by Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1630281 13f79535-47bb-0310-9956-ffa450edef68