updated hws.ThrowError to not return an error and log it to console instead

fixed errors_test

fixed tests

hws/middleware_timer.go

@@ -18,16 +18,24 @@ func startTimer(next http.Handler) http.Handler {
 	)
 }
 
+type contextKey string
+
+func (c contextKey) String() string {
+	return "hws context key " + string(c)
+}
+
+var requestTimerCtxKey = contextKey("request-timer")
+
 // Set the start time of the request
 func setStart(ctx context.Context, time time.Time) context.Context {
-	return context.WithValue(ctx, "hws context key request-timer", time)
+	return context.WithValue(ctx, requestTimerCtxKey, time)
 }
 
 // Get the start time of the request
 func getStartTime(ctx context.Context) (time.Time, error) {
-	start, ok := ctx.Value("hws context key request-timer").(time.Time)
+	start, ok := ctx.Value(requestTimerCtxKey).(time.Time)
 	if !ok {
-		return time.Time{}, errors.New("Failed to get start time of request")
+		return time.Time{}, errors.New("failed to get start time of request")
 	}
 	return start, nil
 }