message: test: fix implicit fallthrough
diff: @@ -126,8 +126,10 @@ std::string TestEnvironment::substitute(const std::string& str,
  switch (version) {
  case Network::Address::IpVersion::v4:
  out_json_string = std::regex_replace(out_json_string, lookup_family_regex, "v4_only");
  + break;
  case Network::Address::IpVersion::v6:
  out_json_string = std::regex_replace(out_json_string, lookup_family_regex, "v6_only");
  + break;
  }
  return out_json_string;
  