GH-3808: Applied review comments

Author: frosiere

spring-kafka/src/main/java/org/springframework/kafka/core/KafkaTemplate.java

@@ -104,6 +104,7 @@
  * @author Gurps Bassi
  * @author Valentina Armenise
  * @author Christian Fredriksson
+ * @author Francois Rosiere
  */
 public class KafkaTemplate<K, V> implements KafkaOperations<K, V>, ApplicationContextAware, BeanNameAware,
 		ApplicationListener<ContextStoppedEvent>, DisposableBean, SmartInitializingSingleton {
@@ -468,9 +469,9 @@ public void setObservationRegistry(ObservationRegistry observationRegistry) {
 	/**
 	 * Return the {@link ObservationRegistry} used by the template.
 	 * @return the observation registry
-	 * @since 3.3.5
+	 * @since 3.2.9
 	 */
-	public ObservationRegistry getObservationRegistry() {
+	protected ObservationRegistry getObservationRegistry() {
 		return this.observationRegistry;
 	}
 
@@ -545,7 +546,7 @@ private String getAdminBootstrapAddress() {
 	/**
 	 * Return the cluster id, if available.
 	 * @return the cluster id.
-	 * @since 3.3.5
+	 * @since 3.2.9
 	 */
 	@Nullable
 	protected String clusterId() {

spring-kafka/src/test/java/org/springframework/kafka/support/micrometer/ObservationTests.java

@@ -106,6 +106,7 @@
  * @author Wang Zhiyang
  * @author Christian Mergenthaler
  * @author Soby Chacko
+ * @author Francois Rosiere
  *
  * @since 3.0
  */