fix typo of prometheus

rest/handler/prometheushandler.go

@@ -31,7 +31,7 @@ var (
 	})
 )
 
-func PrometheousHandler(path string) func(http.Handler) http.Handler {
+func PromethousHandler(path string) func(http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			startTime := timex.Now()

rest/handler/prometheushandler_test.go

@@ -9,7 +9,7 @@ import (
 )
 
 func TestPromMetricHandler(t *testing.T) {
-	promMetricHandler := PrometheousHandler("/user/login")
+	promMetricHandler := PromethousHandler("/user/login")
 	handler := promMetricHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
 	}))