def get_ilo_firmware_version_as_major_minor(self):
        """Gets the ilo firmware version for server capabilities

        Parse the get_host_health_data() to retreive the firmware
        details.

        :param data: the output returned by get_host_health_data()
        :returns: String with the format "<major>.<minor>" or None.

        """
        data = self.get_host_health_data()
        firmware_details = self._get_firmware_embedded_health(data)
        if firmware_details:
            ilo_version_str = firmware_details.get('iLO', None)
            return common.get_major_minor(ilo_version_str)