[Bug]: [DualTor AA] generic_config_updater.test_incremental_qos failed to get uplink, downlink from get_uplink_downlink_count

[echuawu]

Issue Description

At Duator AA setup, all the cases of script generic_config_updater.test_incremental_qos failed due to a common issue:

TypeError: cannot unpack non-iterable NoneType object

uplink, downlink = get_uplink_downlink_count(duthost, tbinfo) failed due to no consideration of Dualtor AA topology.

Results you see

def calculate_field_value(duthost, tbinfo, field):
    """
    Calculates value of specified field

    Args:
        duthost: DUT host object
        tbinfo: information about the running testbed
        field: xoff, ingress_lossless_pool_size, or egress_lossy_pool_size

    """

  uplink, downlink = get_uplink_downlink_count(duthost, tbinfo)

E TypeError: cannot unpack non-iterable NoneType object

Results you expected to see

No failure

Is it platform specific

generic

Relevant log output

No response

Output of show version

No response

Attach files (if any)

No response