HDFS-5374. Remove deadcode in DFSOutputStream. Contributed by Suresh Srinivas.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1533258 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4511. Cover package org.apache.hadoop.hdfs.tools with unit test (Andrey Klochkov via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1533270 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' into trunk-gd
Restore old Rumen tests
Revert "Restore old Rumen tests"

This reverts commit 9cf5010480573d81f8d624d1dc9eefdc5ad4c533.
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-HDFS-4311-trunk-gd