Call AsyncUncaughtExceptionHandler when necessary

If a sub-class of Future (such as ListenableFuture) is used as a return
type and an exception is thrown, the AsyncUncaughtExceptionHandler is
called. Now checking for any Future implementation instead of a faulty
strict matching.

Issue: SPR-12797

spring-aop/src/main/java/org/springframework/aop/interceptor/AsyncExecutionAspectSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -165,7 +165,7 @@ public abstract class AsyncExecutionAspectSupport implements BeanFactoryAware {
 	 * @param params the parameters used to invoke the method
 	 */
 	protected void handleError(Throwable ex, Method method, Object... params) throws Exception {
-		if (method.getReturnType().isAssignableFrom(Future.class)) {
+		if (Future.class.isAssignableFrom(method.getReturnType())) {
 			ReflectionUtils.rethrowException(ex);
 		}
 		else {