Add getException method to StepExecution interface

[follis]

Originally opened as bug 5432 by cf126330

--------------Original Comment History----------------------------
Comment from = cf126330 on 2013-10-02 15:15:54 +0000

StepContext has a getException method:
http://docs.oracle.com/javaee/7/api/javax/batch/runtime/context/StepContext.html

But StepExecution does not:
http://docs.oracle.com/javaee/7/api/javax/batch/runtime/StepExecution.html

Any exception that occurred during a step execution is vital data for a batch client, which can only get hold of StepExecution. StepContext is intended more for the code running inside batch container, not the client. So how about adding getException method to StepExecution interface?

A common use is, a batch job monitoring tool shows step execution data in a table:
id, name, batch status, exit status, exception, metrics