CIC has gone from rule changes anywhere from allowing all kind of tests and written submissions to allowing only IELTS, to allowing only IELTS general training, to allowing academic as well, to allowing only general training again. If you send academic, depending on the mood of the visa officer and how well they have followed up on all the rule changes, they might turn a blind eye and accept it, they might send you a letter and request that you take the proper IELTS or they might return your application as incomplete. I can not tell you how likely each of these outcomes is though.