RCBC-99 read out the StringIO contents in json gem monkey patch
RCBC-99 read out the StringIO contents in json gem monkey patch

Change-Id: Ic1a96172fad63533dc02dfb98c4c8ec9cc69f14d
Reviewed-on: http://review.couchbase.org/23117
Tested-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Reviewed-by: Matt Ingenthron <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@couchbase.com>

dewolfe/couchbase-ruby-client,dewolfe/couchbase-ruby-client