refactor

samples/Sample.Kafka/Controllers/ValuesController.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Cap.Consistency.Attributes;
+using Cap.Consistency.Consumer;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Sample.Kafka.Controllers
+{
+    [Route("api/[controller]")]
+    public class ValuesController : Controller, IConsumerService
+    {
+
+        [KafkaTopic("zzwl.topic.finace.callBack", IsOneWay = true)]
+        public void KafkaTest() {
+            Console.WriteLine("kafka test invoked");
+        }
+    }
+}