Some calls in the Admin API mistakenly encode their response in the headers instead of the response body.  This is made more complicated by the fact that `requests` tries to be helpful while parsing the headers into a case- insensitive dict, which fals since the headers are malformed.
Some calls in the Admin API mistakenly encode their response in the headers
instead of the response body.  This is made more complicated by the fact
that `requests` tries to be helpful while parsing the headers into a case-
insensitive dict, which fals since the headers are malformed.

This commit scans the dict for a good candidate for what would normally be
in the response body and parses it out correctly.

UMIACS/rgwadmin