tornado: Fix a Redis-caused str/bytes bug in `status_inquiries`.
tornado: Fix a Redis-caused str/bytes bug in `status_inquiries`.

Because the Redis client returns exclusively bytes -- even for
hash keys -- even on Python 3, the test `'response' in status`
was always returning false, and the line that tries to decode
as JSON was never running, so we were passing `response`
through as a `bytes` object encoding some JSON.

I'm not sure what the impact of this bug was, and in particular
whether something downstream would have fudged it to make up for
this error.

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