test(bigtable): print hex using %x, sprintf to be valid utf-8 (#4565)
test(bigtable): print hex using %x, sprintf to be valid utf-8 (#4565)

casting byte vals to string was causing some chars to be (randomly) invalid for identifiers
googleapis/google-cloud-go,googleapis/google-cloud-go,googleapis/google-cloud-go,googleapis/google-cloud-go