EncodeJSONResponse - http: superfluous response.WriteHeader call

[aeharvlee]

Describe the bug
When request to rosetta-etheruem using roestta-cli check:data, it often returns

2022/05/22 06:02:13 http: superfluous response.WriteHeader call from github.com/klaytn/rosetta-sdk-go-klaytn/server.EncodeJSONResponse (routers.go:86)

Related source code:

rosetta-sdk-go-klaytn/server/routers.go

Lines 79 to 88 in 34a3f98

	// EncodeJSONResponse uses the json encoder to write an interface to the http response with an
	// optional status code
	func EncodeJSONResponse(i interface{}, status int, w http.ResponseWriter) {
	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
	w.WriteHeader(status)
	if err := json.NewEncoder(w).Encode(i); err != nil {
	http.Error(w, err.Error(), http.StatusInternalServerError)
	}
	}

I found Go Forum posting which deals with this problem and now I'm trying to solve this problem.

[aeharvlee]

I also created coinbase/mesh-sdk-go#407 to share this problem with Coinbase