Users cannot retake a passed quiz.

You can set the Number of Takes in the quiz edit page. If you set unlimited in the number of takes, then the users can retake a quiz.
But even you set the number of takes, the users still cannot retake a quiz. Because in the code, It programmed when the user had passed the quiz and if the users don't have permission to create quizzes, it return false. I think this is a bug.
Here is the patch that fix this error. Please review it and see if this is the best way to fix it. Thanks

Please do not rename issues with undescriptive titles. If it works for you, leave a comment, or mark it RTBC.

Committed

I'm still seeing the offending code in HEAD. I rolled this patch because the previous one missed the removal of the comment on the preceding line.

WestWesterson, would you try and commit this one?

Also, we should keep an eye out for this "maximum repeats" situation in the future. I have a feeling that removing this chunk of code, while necessary at the moment, is going to open up a UI bug in the very near future. Be on the lookout.

should be fixed this time, i don't know how i missed it the first time.