[ISSUE #6331] Optimlize DefaultMQPushConsumerImpl#subscribe method (#6332)

Author: mxsm

client/src/main/java/org/apache/rocketmq/client/impl/consumer/DefaultMQPushConsumerImpl.java

@@ -1246,7 +1246,7 @@ public void subscribe(String topic, String subExpression) throws MQClientExcepti
 
     public void subscribe(String topic, String fullClassName, String filterClassSource) throws MQClientException {
         try {
-            SubscriptionData subscriptionData = FilterAPI.buildSubscriptionData(topic, "*");
+            SubscriptionData subscriptionData = FilterAPI.buildSubscriptionData(topic, SubscriptionData.SUB_ALL);
             subscriptionData.setSubString(fullClassName);
             subscriptionData.setClassFilterMode(true);
             subscriptionData.setFilterClassSource(filterClassSource);