Fix condition where active-backup would fail to engage

[joseph-henry]

In some cases links in a bond wouldn't be marked as bonded resulting in the bonding mode not registering itself as ready. This then results in an active bonding layer that appears to be working when in fact only the classical path handling logic is running.

This can be tested with local.conf similar to (with correct interface names of course):

{
  "settings":
  {
    "allowSecondaryPort": false,
    "defaultBondingPolicy": "rapid-active-backup",
    "policies":
    {
      "rapid-active-backup":
      {
        "basePolicy": "active-backup",
        "failoverInterval": 1000,
        "links":
          {
            "enp7s0": { "failoverTo": "eth0", "mode": "primary" },
            "eth0": { "mode": "spare" }
          }
      }
    }
  }
}

When a cable is pulled:

• What did happen: Sometimes the bond would report using a link when in fact it was using another and then fail to... faillover
• What it does now: Use correct link and failover

[laduke]

we tested across our computers and it worked