Update ForkGrad Approval Action to create an actual new course instead of a...

Update ForkGrad Approval Action to create an actual new course instead of a new generation of an existing course.

application/modules/courses/models/ApprovalActionForkGradModel.php

@@ -131,6 +131,8 @@ class Courses_ApprovalActionForkGradModel extends Requests_ApprovalActionModel
             $newGeneration = clone $course;
             // create a new generation of the course from the input request to base the new request on.
             $gradCourse = clone $course;
+            $gradCourse->_data['course'] = NULL;
+            $gradCourse->_data['parent'] = NULL;
             
             // Grab the home suffix now in case we need to use it later (ie: xx in 4xx/8xx)
             $homeSuffix = substr($course->getCourseNumber(), -2);