Update log level

Issue: SPR-11673

spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompBrokerRelayMessageHandler.java

@@ -400,8 +400,8 @@ public class StompBrokerRelayMessageHandler extends AbstractBrokerMessageHandler
 			if (sessionId == null || SystemStompConnectionHandler.SESSION_ID.equals(sessionId)) {
 				throw new MessageDeliveryException("Message broker is not active.");
 			}
-			if (logger.isTraceEnabled()) {
-				logger.trace("Message broker is not active. Ignoring: " + message);
+			if (logger.isDebugEnabled()) {
+				logger.debug("Message broker is not active. Ignoring: " + message);
 			}
 			return;
 		}
@@ -712,8 +712,8 @@ public class StompBrokerRelayMessageHandler extends AbstractBrokerMessageHandler
 
 			if (!this.isStompConnected) {
 				if (this.isRemoteClientSession) {
-					if (logger.isTraceEnabled()) {
-						logger.trace("Ignoring client message received " + message +
+					if (logger.isDebugEnabled()) {
+						logger.debug("Ignoring client message received " + message +
 								(conn != null ? "before CONNECTED frame" : "after TCP connection closed"));
 					}
 					return EMPTY_TASK;