DATACASS-686 - Adapt to changes in Spring Framework's ClassUtils.isPrimitiveOrWrapper.

Switch processing order to suppress element emission for query methods declaring Mono<Void> or Flux<Void>.

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/repository/query/ReactiveCassandraQueryExecution.java

@@ -220,11 +220,8 @@ interface ReactiveCassandraQueryExecution {
 
 			ReturnedType returnedType = processor.getReturnedType();
 
-			if (ClassUtils.isPrimitiveOrWrapper(returnedType.getReturnedType())) {
-				return source;
-			}
-
 			if (returnedType.getReturnedType().equals(Void.class)) {
+
 				if (source instanceof Mono) {
 					return ((Mono<?>) source).then();
 				}
@@ -234,6 +231,10 @@ interface ReactiveCassandraQueryExecution {
 				}
 			}
 
+			if (ClassUtils.isPrimitiveOrWrapper(returnedType.getReturnedType())) {
+				return source;
+			}
+
 			if (returnedType.isInstance(source)) {
 				return source;
 			}