visibility_limited_to_course_sections? should return true if all of the enrollments have limited_section_privileges ignoring observer enrollments
closes gh-2245
Test Plan:
Enroll a teacher in a section of course with limit section privileges set to true
Enroll a student in a different section of the same course with limit section privileges set to true
Set up the teacher as an observer of the student (for example the teacher teaches a section of a course but has a son or daughter taking a different section of the same course) Confirm the teacher cannot view all sections and can only see the two sections.
visibility_limited_to_course_sections? should return true if all of the enrollments have limited_section_privileges ignoring observer enrollments
closes gh-2245
Test Plan: