Harshavardhana dd2831c1a0 fix: remove parent dirs in RenameData upon failure (#12452) ...

- it is possible that during I/O failures we might
  leave partially written directories, make sure
  we purge them after.

- rename current data-dir (null) versionId only after
  the newer xl.meta has been written fully.

- attempt removal once for minioMetaTmpBucket/uuid/
  as this folder is empty if all previous operations
  were successful, this allows avoiding recursive os.Remove()

2021-06-07 09:35:08 -07:00

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