Fix the logic for getting local networks in network-manager

[niusmallnan]

network/local.go in network-manager:

func LocalNetworks(mc metadata.Client) ([]metadata.Network, map[string]metadata.Container, error) {
...
...
	for _, service := range services {
		// Trick to select the primary service of the network plugin
		// stack
		// TODO: Need to check if it's needed for Calico?
		if !(service.Kind == "networkDriverService" &&
			service.Name == service.PrimaryServiceName) {
			continue
		}

		for _, aContainer := range service.Containers {
			if aContainer.HostUUID == host.UUID {
				routers[aContainer.NetworkUUID] = aContainer
				localNetworks[aContainer.NetworkUUID] = true
			}
		}
	}

	if len(localNetworks) == 0 {
		return nil, nil, nil
	}

	ret := []metadata.Network{}
	for _, aNetwork := range networks {
		if _, ok := localNetworks[aNetwork.UUID]; ok {
			ret = append(ret, aNetwork)
		}
	}
}

Here, sometimes we can not get the right localNetworks when using l2-flat or l3-routing netwoking.

[yasker]

Fixed by rancher/plugin-manager#78