RoleSystem a controller allowing only admin access
- should allow an admin access
- should prevent access by anyone who is not an admin

RoleSystem a controller allowing access to actions by role
- should grant access to content_editor and admin for new
- should grant acccess to editor for index
- should only give destroy access to admin
- should not give access to index to admin

RoleSystem a controller allowing access under certain conditions
- should grant access to admin unless access is revoked ahead of time
- should allow access to content_editors if special access is granted