Avoid stack overflow in case of chained factory-bean references to FactoryBean class

Issue: SPR-14551
(cherry picked from commit 8b5d355)

spring-orm/src/test/java/org/springframework/orm/jpa/AbstractEntityManagerFactoryIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -90,7 +90,7 @@ public abstract class AbstractEntityManagerFactoryIntegrationTests extends org.s
 	}
 
 
-	static enum Provider {
+	enum Provider {
 
 		ECLIPSELINK, HIBERNATE, OPENJPA
 	}

spring-orm/src/test/resources/org/springframework/orm/jpa/hibernate/hibernate-manager.xml

@@ -30,4 +30,10 @@
 		</property>
 	</bean>
 
+	<bean id="sessionFactory" factory-bean="entityManagerFactory" factory-method="getSessionFactory"/>
+
+	<bean id="hibernateStatistics" factory-bean="sessionFactory" factory-method="getStatistics"/>
+
+	<bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>
+
 </beans>