CORD-2571 Update location of dataPlaneIp

Change-Id: I535541e59ef5cf36fb6d030e93aaf791f3dce442
diff --git a/xos/synchronizer/steps/sync_addressmanagerserviceinstance.py b/xos/synchronizer/steps/sync_addressmanagerserviceinstance.py
index 82f0d67..56e5cfb 100644
--- a/xos/synchronizer/steps/sync_addressmanagerserviceinstance.py
+++ b/xos/synchronizer/steps/sync_addressmanagerserviceinstance.py
@@ -139,7 +139,7 @@
             instance = Instance.objects.filter(id=instance_id)[0]
 
         node = instance.node
-        dataPlaneIp = self.get_node_tag(node, DATAPLANE_IP)
+        dataPlaneIp = node.dataPlaneIp
 
         if not dataPlaneIp:
             raise DeferredException("No IP found for node %s tenant %s -- skipping" % (str(node), str(address_si)))