ChecksumFileSystem's rename doesn't correctly handle checksum files
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                 Key: HADOOP-8001
                 URL: https://issues.apache.org/jira/browse/HADOOP-8001
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs
    Affects Versions: 0.23.0, 0.24.0
            Reporter: Daryn Sharp
            Assignee: Daryn Sharp


Rename will move the src file and its crc *if present* to the destination.  If 
the src file has no crc, but the destination already exists with a crc, then 
src will be associated with the old file's crc.  Subsequent access to the file 
will fail with checksum errors.

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