while trying to commit MAPREDUCE-5113 to branch-2 I've noticed that the
CHANGES.txt are out of sync. Commit message are on the wrong releases.
I've spent some some time trying to fix it, but I did not find it straight
forward to do so.
I assume the same may be true for common, hdfs and yarn.
I know why we use CHANGES.txt files has been discussed in the past, so I'll
not raise a suggestion to get rid of them.
Does anybody has a simple list of steps to fix this ?