checkConfigurationClassCandidate explicitly skips factory method definitions

Issue: SPR-14603
(cherry picked from commit 1fbd047)

spring-context/src/main/java/org/springframework/context/annotation/ConfigurationClassUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -79,7 +79,7 @@ abstract class ConfigurationClassUtils {
 	 */
 	public static boolean checkConfigurationClassCandidate(BeanDefinition beanDef, MetadataReaderFactory metadataReaderFactory) {
 		String className = beanDef.getBeanClassName();
-		if (className == null) {
+		if (className == null || beanDef.getFactoryMethodName() != null) {
 			return false;
 		}