Adding ADTRAN config

Change-Id: I9cdd3889441836a282feccf4d19479b378de4470
diff --git a/tosca-configs/att-workflow/onlab-pod1-bbsim.yaml b/tosca-configs/att-workflow/onlab-pod1-bbsim.yaml
index e6011a9..2ab8a89 100755
--- a/tosca-configs/att-workflow/onlab-pod1-bbsim.yaml
+++ b/tosca-configs/att-workflow/onlab-pod1-bbsim.yaml
@@ -23,6 +23,8 @@
   - custom_types/attworkflowdriverwhitelistentry.yaml
   - custom_types/attworkflowdriverservice.yaml
   - custom_types/rcordsubscriber.yaml
+  - custom_types/serviceinstanceattribute.yaml
+  - custom_types/onosapp.yaml
 description: Create a simulated OLT Device in VOLTHA
 topology_template:
   node_templates:
@@ -51,12 +53,35 @@
             node: service#volt
             relationship: tosca.relationships.BelongsToOne
 
+    # POD Config
     bngmapping:
       type: tosca.nodes.BNGPortMapping
       properties:
         s_tag: any
         switch_port: 31
 
+    # DHCP L2 Relay config
+    onos_app#dhcpl2relay:
+      type: tosca.nodes.ONOSApp
+      properties:
+        name: dhcpl2relay
+        must-exist: true
+
+    dhcpl2relay-config-attr:
+      type: tosca.nodes.ServiceInstanceAttribute
+      properties:
+        name: /onos/v1/network/configuration/apps/org.opencord.dhcpl2relay
+        value: >
+          {
+            "dhcpl2relay" : {
+              "useOltUplinkForServerPktInOut" : true
+            }
+          }
+      requirements:
+        - service_instance:
+            node: onos_app#dhcpl2relay
+            relationship: tosca.relationships.BelongsToOne
+
     # Whitelist
     service#att:
       type: tosca.nodes.AttWorkflowDriverService