修改：

BlockChian producer，增加对enable标志的判断，决定是否启用BC的mq消息生产者

epmet-module/epmet-third/epmet-third-server/src/main/java/com/epmet/mq/producer/BlockChainProducer.java

@@ -57,6 +57,13 @@ public class BlockChainProducer {
     @PostConstruct
     private void postConstruct() {
         try {
+            
+            // 如果没有启用，则跳过
+            if (!rocketMQProperties.getBlockChain().getEnable()) {
+                log.info("未开启区块链的MQ配置，初始化Producer动作取消");
+                return;
+            }
+            
             producer = new DefaultMQProducer(GROUP_EPMET_CLOUD_PROJECT_SENDER,
                     new AclClientRPCHook(new SessionCredentials(rocketMQProperties.getBlockChain().getAccessKey(), rocketMQProperties.getBlockChain().getSecretKey())));
             producer.setNamesrvAddr(rocketMQProperties.getBlockChain().getNameServer());
@@ -82,6 +89,13 @@ public class BlockChainProducer {
      */
     public void sendMsg(String topic, String tag, String content) {
         try {
+
+            // 如果没有启用，则跳过
+            if (!rocketMQProperties.getBlockChain().getEnable()) {
+                log.info("未开启区块链的MQ配置，发送消息到区块链动作取消");
+                return;
+            }
+            
             Message msg = new Message(topic, tag, content.getBytes(RemotingHelper.DEFAULT_CHARSET));
             SendResult sendResult = producer.send(msg);
             if (SendStatus.SEND_OK == sendResult.getSendStatus()