You didn't use my test case for submission jar, otherwise you would have spot it before submitting. If they are very punctual/strict, this could be an automatic failure. But to my opinion that would be very harsh. But Roberto Perillo passed without generating stubs and he violated also a must requirement and passed, so I'll think you'll just be fine.
Your assignment will only be graded after you took the essay exam. So you have to take first essay exam, before you'll know if you failed (automatically). If you fail (automatically) you don't need to retake the essay exam, just resubmit your assignment.
You could also send an email to Sun asking if you could upload your assignment again - several people have done that in the past. If the assignment and exam answers have not yet been sent to an assessor then you can fix that typo.