HIVE-8497: StatsNoJobTask doesn't close RecordReader, FSDataInputStream of which keeps open to prevent stale data clean (Xiaobing Zhou via Prasanth J)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1633236 13f79535-47bb-0310-9956-ffa450edef68