HIVE-8779: Tez in-place progress UI can show wrong estimated time for sub-second queries (Prasanth J reviewed by Gopal V)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1637415 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8778: ORC split elimination can cause NPE when column statistics is null (Prasanth J reviewed by Gopal V)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1637418 13f79535-47bb-0310-9956-ffa450edef68