HADOOP-9614. smart-test-patch.sh hangs for new version of patch (2.7.1) (Ravi Prakash via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1489159 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-0.23' into branch-0.23-gd
Merge remote branch 'origin/branch-0.23-gd' into fb-HADOOP-9281-branch-0.23-gd