Fix Sonar Issues

Author: garyrussell

Diff for: spring-kafka/src/main/java/org/springframework/kafka/listener/ExceptionClassifier.java

@@ -165,7 +165,7 @@ private void add(boolean classified, Class<? extends Exception>... exceptionType
 	 */
 	@Deprecated
 	public boolean removeNotRetryableException(Class<? extends Exception> exceptionType) {
-		return this.removeClassification(exceptionType);
+		return Boolean.TRUE.equals(removeClassification(exceptionType)) ? true : false;
 	}
 
 	/**

Diff for: spring-kafka/src/main/java/org/springframework/kafka/retrytopic/ListenerContainerFactoryConfigurer.java

@@ -196,7 +196,7 @@ public final void setBlockingRetryableExceptions(Class<? extends Exception>... e
 				() -> "Blocking retryable exceptions have already been set."
 						+  "Current ones: " + Arrays.toString(this.blockingExceptionTypes)
 						+ " You provided: " + Arrays.toString(exceptionTypes));
-		this.blockingExceptionTypes = exceptionTypes;
+		this.blockingExceptionTypes = Arrays.copyOf(exceptionTypes, exceptionTypes.length);
 	}
 
 	private ConcurrentKafkaListenerContainerFactory<?, ?> doConfigure(