Add exception-handler attribute support for AspectJ

Previously, the exception-handler attribute was not taken care of when
task:annotation-driven is used in AspectJ mode. This commit provides the
expected behavior.

Issue: SPR-12619

spring-context/src/test/resources/org/springframework/scheduling/config/annotationDrivenContext.xml

@@ -7,10 +7,14 @@
 				http://www.springframework.org/schema/task
 				http://www.springframework.org/schema/task/spring-task.xsd">
 
-	<task:annotation-driven executor="testExecutor" scheduler="testScheduler"/>
+	<task:annotation-driven executor="testExecutor" scheduler="testScheduler"
+							exception-handler="testExceptionHandler"/>
 
 	<task:executor id="testExecutor"/>
 
 	<task:scheduler id="testScheduler"/>
 
+	<bean id="testExceptionHandler"
+		  class="org.springframework.aop.interceptor.SimpleAsyncUncaughtExceptionHandler"/>
+
 </beans>