'Get the IPv4Address from the director port.
:param array: the array serial number
:param port_id: the director port identifier
:returns: (list of ip_addresses, iqn)'

def get_iscsi_ip_address_and_iqn(self, array, port_id):

    (ip_addresses, iqn) = (None, None)
    port_details = self.get_port(array, port_id)
    if port_details:
        ip_addresses = port_details['symmetrixPort']['ip_addresses']
        iqn = port_details['symmetrixPort']['identifier']
    return (ip_addresses, iqn)
