Revert "HDFS-10845. Change defaults in hdfs-site.xml to match timeunit type. Contributed by Yiqun Lin" This reverts commit b6d839a60ceed733bfacb791fc5ed06116720dd0. Conflicts: hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml (cherry picked from commit 2f2f822488c8da0227b95548c1fe40823b16a44d)