HIVE-5882: Reduce logging verbosity on Tez (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1545429 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5883: Plan is deserialized more often than necessary on Tez (in container reuse case) (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1545434 13f79535-47bb-0310-9956-ffa450edef68