GH-3968: public IntObjSupp.setConversionService

Fixes #3968

The `IntegrationObjectSupport.setConversionService()` is protected by accident

Author: artembilan

spring-integration-core/src/main/java/org/springframework/integration/context/IntegrationObjectSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -267,7 +267,7 @@ public ConversionService getConversionService() {
 		return this.conversionService;
 	}
 
-	protected void setConversionService(ConversionService conversionService) {
+	public void setConversionService(ConversionService conversionService) {
 		this.conversionService = conversionService;
 	}
 

spring-integration-core/src/test/java/org/springframework/integration/router/RouterConcurrencyTest.java renamed to spring-integration-core/src/test/java/org/springframework/integration/router/RouterConcurrencyTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,7 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.core.convert.ConversionService;
@@ -40,11 +40,12 @@
 
 /**
  * @author Gary Russell
+ * @author Artem Bilan
  *
  * @since 3.0
  *
  */
-public class RouterConcurrencyTest {
+public class RouterConcurrencyTests {
 
 	@Test
 	public void test() throws Exception {
@@ -57,7 +58,7 @@ protected Collection<MessageChannel> determineTargetChannels(Message<?> message)
 			}
 
 			@Override
-			protected void setConversionService(ConversionService conversionService) {
+			public void setConversionService(ConversionService conversionService) {
 				try {
 					if (count.incrementAndGet() > 1) {
 						Thread.sleep(20);