def self_service_reminder_frequency=(days)
      return if days == self_service_reminder_frequency
      validate_notification_reminders_supported
      JSS::Validate.integer days
      @self_service_reminder_frequency = days
      @need_to_update = true
    end
def self_service_reminder_frequency=(days)
      return if days == self_service_reminder_frequency
      validate_notification_reminders_supported
      JSS::Validate.integer days
      @self_service_reminder_frequency = days
      @need_to_update = true
    end
set reminder notification frequency

 @param new_val[Integer] How many days between reminder notifications?

 @return [void]