IN PROGRESS - issue BATCH-491: checked exception handling

http://jira.springframework.org/browse/BATCH-491

exception handler signature changed to 'throws Throwable' so that it can simply rethrow without wrapping.

spring-batch-samples/src/main/java/org/springframework/batch/sample/exception/handler/FootballExceptionHandler.java

@@ -11,10 +11,10 @@ public class FootballExceptionHandler implements ExceptionHandler {
 			.getLog(FootballExceptionHandler.class);
 
 	public void handleException(RepeatContext context, Throwable throwable)
-			throws RuntimeException {
+			throws Throwable {
 
 		if (!(throwable instanceof NumberFormatException)) {
-			throw new RuntimeException(throwable);
+			throw throwable;
 		} else {
 			logger.error("Number Format Exception!", throwable);
 		}