Release candidate - 2.8.3-RC0
HDFS-12638. Delete copy-on-truncate block along with the original block, when deleting a file being truncated. Contributed by Konstantin Shvachko. (cherry picked from commit 60fd0d7fd73198fd610e59d1a4cd007c5fcc7205) (cherry picked from commit 19c18f7cc90c8243af634600c4c69ec1109fcce6)