Add @Override annotations to test sources

Issue: SPR-10129

spring-beans/src/test/java/com/foo/ComponentBeanDefinitionParser.java

@@ -13,6 +13,7 @@ import org.w3c.dom.Element;
 
 public class ComponentBeanDefinitionParser extends AbstractBeanDefinitionParser {
 
+	@Override
 	protected AbstractBeanDefinition parseInternal(Element element,
 			ParserContext parserContext) {
 		return parseComponentElement(element);

spring-beans/src/test/java/com/foo/ComponentFactoryBean.java

@@ -16,6 +16,7 @@ public class ComponentFactoryBean implements FactoryBean<Component> {
 		this.children = children;
 	}
 
+	@Override
 	public Component getObject() throws Exception {
 		if (this.children != null && this.children.size() > 0) {
 			for (Component child : children) {
@@ -25,10 +26,12 @@ public class ComponentFactoryBean implements FactoryBean<Component> {
 		return this.parent;
 	}
 
+	@Override
 	public Class<Component> getObjectType() {
 		return Component.class;
 	}
 
+	@Override
 	public boolean isSingleton() {
 		return true;
 	}

spring-beans/src/test/java/com/foo/ComponentNamespaceHandler.java

@@ -3,6 +3,7 @@ package com.foo;
 import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
 
 public class ComponentNamespaceHandler extends NamespaceHandlerSupport {
+	@Override
 	public void init() {
 		registerBeanDefinitionParser("component",
 				new ComponentBeanDefinitionParser());