Enhancements to AT&T workflow

- Add DHCP IPV6 flow in upstream trap flow
- Add DHCP IPV6 NNI trap flow and LLDP NNI trap flow

Change-Id: Iae13aff7e5990ae3662ccea1e308b5a1efae9724
diff --git a/core/dt_workflow.go b/core/dt_workflow.go
index 2b06b71..46608ee 100644
--- a/core/dt_workflow.go
+++ b/core/dt_workflow.go
@@ -117,8 +117,13 @@
 	return nil
 }
 
-func (dt DtWorkFlow) ProvisionDhcpFlow(subs *Subscriber) error {
-	log.Info("dt-workflow-does-not-require-dhcp-support--nothing-to-do")
+func (dt DtWorkFlow) ProvisionDhcpIPV4Flow(subs *Subscriber) error {
+	log.Info("dt-workflow-does-not-require-dhcp-ipv4-support--nothing-to-do")
+	return nil
+}
+
+func (dt DtWorkFlow) ProvisionDhcpIPV6Flow(subs *Subscriber) error {
+	log.Info("dt-workflow-does-not-require-dhcp-ipv6-support--nothing-to-do")
 	return nil
 }