Commits
Antoine Pitrou authored and David Li committed a95d6889b82
ARROW-16012: [C++] Retry S3 request in tests when Minio not fully initialized
Avoid sporadic test failures with this kind of error message:
```
'fs_->CopyFile("bucket/somefile", "bucket/newfile")' failed with IOError: When copying key 'somefile' in bucket 'bucket' to key 'newfile' in bucket 'bucket': AWS Error [code 100]: Unable to parse ExceptionName: XMinioServerNotInitialized Message: Server not initialized, please try again.
```
Closes #12697 from pitrou/ARROW-16012-minio-init
Authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: David Li <li.davidm96@gmail.com>