Harshavardhana 976870a391 fs: Migration should handle bucketConfigs as regular objects. (#4482) ...

Current code failed to anticipate the existence of files
which could have been created to corrupt the namespace such
as `policy.json` file created at the bucket top level.

In the current release creating such as file conflicts
with the namespace for future bucket policy operations.
We implemented migration of backend format to avoid situations
such as these.

This PR handles this situation, makes sure that the
erroneous files should have been moved properly.

Fixes #4478

2017-06-06 12:15:35 -07:00

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