WL-100 fixed the bug on the edit/add coupon and set course price.
Ajax requests were duplicating in each callback. fixed this issue by creating the manual ajax request rather than the Lean Modal Ajax requests
Merge pull request #5586 from edx/muhhshoaib/WL-100-coupon-codes-duplicating-upon-creation

WL-100 fixed the bug on the edit/add coupon and set course price.