IMPALA-973: Fix for invalidate metadata behaviour

Change-Id: Ie0c4c458b0919978b03ebaba28bf37950dd34643
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3009
Tested-by: jenkins
Reviewed-by: Anusha Dasarakothapalli <anusha.dasarakothapalli@cloudera.com>