Fix HDFS change log from left over merge entries

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1439459 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9247. Merge r1438698 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1439533 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9255. relnotes.py missing last jira (tgraves)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1439604 13f79535-47bb-0310-9956-ffa450edef68