Fix RabbitMQ polling bug.

src/DotNetCore.CAP.RabbitMQ/IProcessor.RabbitJobProcessor.cs

@@ -136,11 +136,10 @@ namespace DotNetCore.CAP.RabbitMQ
                 using (var connection = factory.CreateConnection())
                 using (var channel = connection.CreateModel())
                 {
-                    channel.ExchangeDeclare(exchange: "topic_logs",
+                    channel.ExchangeDeclare(exchange: "test",
                                             type: "topic");
-
                     var body = Encoding.UTF8.GetBytes(content);
-                    channel.BasicPublish(exchange: "topic_logs",
+                    channel.BasicPublish(exchange: "test",
                                          routingKey: topic,
                                          basicProperties: null,
                                          body: body);

src/DotNetCore.CAP.RabbitMQ/RabbitMQConsumerClient.cs

 using System;
 using System.Text;
+using System.Threading.Tasks;
 using DotNetCore.CAP.Infrastructure;
 using RabbitMQ.Client;
 using RabbitMQ.Client.Events;
@@ -53,6 +54,10 @@ namespace DotNetCore.CAP.RabbitMQ
             var consumer = new EventingBasicConsumer(_channel);
             consumer.Received += OnConsumerReceived;
             _channel.BasicConsume(_queueName, true, consumer);
+            while (true)
+            {
+                Task.Delay(timeout);
+            }
         }
 
         public void Subscribe(string topic)