test(be): 멀티 스레드 초기화

Author: ki-met-hoon

src/backend/chat_server/src/main/java/com/jootalkpia/chat_server/service/KafkaConsumer.java

@@ -40,8 +40,7 @@ public void processMinutePrice(String kafkaMessage) {
 
     @KafkaListener(
             topics = "${topic.chat}",
-            groupId = "${group.chat}",
-            concurrency = "3"
+            groupId = "${group.chat}"
     )
     public void processChatMessage(@Header(KafkaHeaders.RECEIVED_KEY) String channelId, String kafkaMessage) {
         try {
@@ -56,8 +55,7 @@ public void processChatMessage(@Header(KafkaHeaders.RECEIVED_KEY) String channel
 
     @KafkaListener(
             topics = "${topic.push}",
-            groupId = "${group.push}",
-            concurrency = "8"
+            groupId = "${group.push}"
     )
     public void processPushMessage(String kafkaMessage) {
         try {

src/backend/state_server/src/main/java/com/jootalkpia/state_server/service/KafkaConsumer.java

@@ -21,8 +21,7 @@ public class KafkaConsumer {
 
     @KafkaListener(
             topics = "${topic.chat}",
-            groupId = "${group.status}",
-            concurrency = "3"
+            groupId = "${group.status}"
     )
     public void processState(String kafkaMessage) {
         ObjectMapper mapper = new ObjectMapper();