Update spring rabbitmq test

Author: liuhaolong10

docs/en/setup/service-agent/java-agent/Plugin-list.md

@@ -114,9 +114,7 @@
 - spring-core-patch
 - spring-kafka-1.x
 - spring-kafka-2.x
-- spring-rabbit-2.x
-- spring-rabbit-3.x
-- spring-rabbit-4.x
+- spring-rabbitmq
 - spring-mvc-annotation
 - spring-mvc-annotation-3.x
 - spring-mvc-annotation-4.x

test/plugin/scenarios/spring-rabbitmq-2.x-scenario/src/main/java/org/apache/skywalking/apm/testcase/spring/rabbitmq/controller/CaseController.java

@@ -18,16 +18,8 @@
 
 package org.apache.skywalking.apm.testcase.spring.rabbitmq.controller;
 
-import com.rabbitmq.client.AMQP;
-import com.rabbitmq.client.Channel;
-import com.rabbitmq.client.Connection;
-import com.rabbitmq.client.ConnectionFactory;
-
-import java.nio.charset.StandardCharsets;
-
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.springframework.amqp.core.Message;
 import org.springframework.amqp.rabbit.annotation.RabbitListener;
 import org.springframework.amqp.rabbit.core.RabbitTemplate;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -37,6 +29,10 @@
 import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.bind.annotation.RestController;
 
+import com.rabbitmq.client.Channel;
+import com.rabbitmq.client.Connection;
+import com.rabbitmq.client.ConnectionFactory;
+
 @RestController
 @RequestMapping("/case")
 @PropertySource("classpath:application.yml")