Move role related views to FAB Auth manager:

- List roles
- Edit role
- Create role
- View role
user_role_objects = set()
        
        if len(self.auth_roles_mapping) > 0:
            user_role_keys = self.ldap_extract_list(user_attributes, self.auth_ldap_group_field)
            user_role_objects.update(self.get_roles_from_keys(user_role_keys))
        
        if self.auth_user_registration:
            registration_role_name = self.auth_user_registration_role
            
            fab_role = self.find_role(registration_role_name)
            if fab_role:
                user_role_objects.add(fab_role)
            else:
                log.warning("Can't find AUTH_USER_REGISTRATION role: %s", registration_role_name)
        return list(user_role_objects)
    def _ldap_bind_indirect(self, ldap, con) -> None: