Use @Configuration(proxyBeanMethods=false)

Related to spring-projects/spring-integration#2988

For faster startup (and possibility to compile to native code with GraalVM)
use a `proxyBeanMethods = false` on all the `@configuration` classes
in the Framework
* Provide some other code style polishing

Author: artembilan

spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaBootstrapConfiguration.java

@@ -33,19 +33,19 @@
  *
  * @author Stephane Nicoll
  * @author Gary Russell
+ * @author Artem Bilan
  *
  * @see KafkaListenerAnnotationBeanPostProcessor
  * @see KafkaListenerEndpointRegistry
  * @see EnableKafka
  */
-@Configuration
+@Configuration(proxyBeanMethods = false)
 public class KafkaBootstrapConfiguration {
 
-	@SuppressWarnings("rawtypes")
 	@Bean(name = KafkaListenerConfigUtils.KAFKA_LISTENER_ANNOTATION_PROCESSOR_BEAN_NAME)
 	@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
-	public KafkaListenerAnnotationBeanPostProcessor kafkaListenerAnnotationProcessor() {
-		return new KafkaListenerAnnotationBeanPostProcessor();
+	public KafkaListenerAnnotationBeanPostProcessor<?, ?> kafkaListenerAnnotationProcessor() {
+		return new KafkaListenerAnnotationBeanPostProcessor<>();
 	}
 
 	@Bean(name = KafkaListenerConfigUtils.KAFKA_LISTENER_ENDPOINT_REGISTRY_BEAN_NAME)

spring-kafka/src/main/java/org/springframework/kafka/annotation/KafkaStreamsDefaultConfiguration.java

@@ -39,7 +39,7 @@
  *
  * @since 1.1.4
  */
-@Configuration
+@Configuration(proxyBeanMethods = false)
 public class KafkaStreamsDefaultConfiguration {
 
 	/**
@@ -56,8 +56,8 @@ public class KafkaStreamsDefaultConfiguration {
 	@Bean(name = DEFAULT_STREAMS_BUILDER_BEAN_NAME)
 	public StreamsBuilderFactoryBean defaultKafkaStreamsBuilder(
 			@Qualifier(DEFAULT_STREAMS_CONFIG_BEAN_NAME)
-				ObjectProvider<KafkaStreamsConfiguration> streamsConfigProvider,
-				ObjectProvider<StreamsBuilderFactoryBeanCustomizer> customizerProvider) {
+					ObjectProvider<KafkaStreamsConfiguration> streamsConfigProvider,
+			ObjectProvider<StreamsBuilderFactoryBeanCustomizer> customizerProvider) {
 
 		KafkaStreamsConfiguration streamsConfig = streamsConfigProvider.getIfAvailable();
 		if (streamsConfig != null) {