Revert "HDFS-8623. Refactor NameNode handling of invalid, corrupt, and under-recovery blocks. Contributed by Zhe Zhang."

This reverts commit de480d6c8945bd8b5b00e8657b7a72ce8dd9b6b5.

(cherry picked from commit 663eba0ab1c73b45f98e46ffc87ad8fd91584046)
13 files changed