MB-7629 Use better values for testing

The new values were produced by CouchDB (Erlang), therefore
it's better to check that we can decode these values and
encode them back to the exact same byte sequence that CouchDB
produced.

Change-Id: Ie8de31d63a790a9fd1d0c0b608f53e320b16343e
Reviewed-on: http://review.couchbase.org/25617
Reviewed-by: Fulu Li <fulu@couchbase.com>
Tested-by: Filipe David Borba Manana <fdmanana@gmail.com>