Backoff KotlinBeanInfoFactory for enum types.

We now no longer contribute properties for enum types.

Closes #2990

src/main/java/org/springframework/data/util/KotlinBeanInfoFactory.java

@@ -48,7 +48,7 @@ public class KotlinBeanInfoFactory implements BeanInfoFactory, Ordered {
 	@Override
 	public BeanInfo getBeanInfo(Class<?> beanClass) throws IntrospectionException {
 
-		if (beanClass.isInterface()) {
+		if (beanClass.isInterface() || beanClass.isEnum()) {
 			return null; // back-off to leave interface-based properties to the default mechanism.
 		}
 
@@ -56,7 +56,6 @@ public class KotlinBeanInfoFactory implements BeanInfoFactory, Ordered {
 			return null;
 		}
 
-
 		KClass<?> kotlinClass = JvmClassMappingKt.getKotlinClass(beanClass);
 		List<PropertyDescriptor> pds = new ArrayList<>();