Introduce @EnableSpringConfigured

Equivalent to <context:spring-configured/>.

Also update @EnableLoadTimeWeaving Javadoc and spring-configured XSD
documentation to reflect.

Issue: SPR-7888

org.springframework.aspects/src/test/java/org/springframework/beans/factory/aspectj/AnnotationBeanConfigurerTests.java

@@ -0,0 +1,43 @@
+/*
+ * 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.beans.factory.aspectj;
+
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
+
+/**
+ * Tests that @EnableSpringConfigured properly registers an
+ * {@link AnnotationBeanConfigurerAspect}, just as does {@code <context:spring-configured>}
+ *
+ * @author Chris Beams
+ * @since 3.1
+ */
+public class AnnotationBeanConfigurerTests extends AbstractBeanConfigurerTests {
+
+	@Override
+	protected ConfigurableApplicationContext createContext() {
+		return new AnnotationConfigApplicationContext(Config.class);
+	}
+
+	@Configuration
+	@ImportResource("org/springframework/beans/factory/aspectj/beanConfigurerTests-beans.xml")
+	@EnableSpringConfigured
+	static class Config {
+	}
+}