Added test for custom async annotation

Author: jhoeller

spring-context/src/main/java/org/springframework/scheduling/annotation/Async.java

@@ -42,7 +42,7 @@
  * @see AnnotationAsyncExecutionInterceptor
  * @see AsyncAnnotationAdvisor
  */
-@Target({ElementType.TYPE, ElementType.METHOD})
+@Target({ElementType.METHOD, ElementType.TYPE})
 @Retention(RetentionPolicy.RUNTIME)
 @Documented
 public @interface Async {

spring-context/src/test/java/org/springframework/scheduling/annotation/AsyncExecutionTests.java

@@ -16,6 +16,8 @@
 
 package org.springframework.scheduling.annotation;
 
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
 import java.util.concurrent.Future;
 
 import org.junit.Test;
@@ -200,7 +202,7 @@ public void doSomething(int i) {
 			assertTrue(Thread.currentThread().getName().startsWith("e1-"));
 		}
 
-		@Async("e2")
+		@MyAsync
 		public Future<String> returnSomething(int i) {
 			assertTrue(!Thread.currentThread().getName().equals(originalThreadName));
 			assertTrue(Thread.currentThread().getName().startsWith("e2-"));
@@ -215,6 +217,12 @@ public Future<String> returnSomething2(int i) {
 	}
 
 
+	@Async("e2")
+	@Retention(RetentionPolicy.RUNTIME)
+	public @interface MyAsync {
+	}
+
+
 	@Async
 	public static class AsyncClassBean {