external netwrok list missing

This change is to add external network list item in the
networker ovs dpdk nodeset CR.

Author: Jaganathan Palanisamy

examples/va/nfv/ovs-dpdk-networker/networker/nodeset/values.yaml

@@ -195,6 +195,8 @@ data:
         subnetName: subnet1
       - name: tenant
         subnetName: subnet1
+      - name: external
+        subnetName: subnet1
     nodes:
       networker-0:
         hostName: networker-0