Polish tests and Javadoc for SPR-8824

Issue: SPR-8824

org.springframework.context/src/test/java/org/springframework/context/annotation/configuration/DuplicateConfigurationClassPostProcessorTests-context.xml

@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-
-<beans xmlns="http://www.springframework.org/schema/beans"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xmlns:neo4j="http://www.springframework.org/schema/data/neo4j"
-	xmlns:context="http://www.springframework.org/schema/context"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
-		http://www.springframework.org/schema/data/neo4j http://www.springframework.org/schema/data/neo4j/spring-neo4j-2.0.xsd
-		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
-
-	<bean id="a" class="org.springframework.context.annotation.ConfigurationClassPostProcessor"/>
-	<bean id="b" class="org.springframework.context.annotation.ConfigurationClassPostProcessor"/>
-	<bean id="c" class="org.springframework.context.annotation.DuplicateConfigurationClassPostProcessorTests$Config"/>
-</beans>
-

org.springframework.context/src/test/java/org/springframework/context/annotation/configuration/DuplicateConfigurationClassPostProcessorTests.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2002-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.springframework.context.annotation.configuration;
 
 import org.junit.Test;
@@ -19,7 +35,7 @@ import org.springframework.context.support.GenericApplicationContext;
 public class DuplicateConfigurationClassPostProcessorTests {
 
 	@Test
-	public void test() {
+	public void repro() {
 		GenericApplicationContext ctx = new GenericApplicationContext();
 		ctx.registerBeanDefinition("a", new RootBeanDefinition(ConfigurationClassPostProcessor.class));
 		ctx.registerBeanDefinition("b", new RootBeanDefinition(ConfigurationClassPostProcessor.class));