CORD-1177: Brought vOLT service over to xproto

Change-Id: Ia80b9bef655302694d7a48fde2aa16d04ae657a5
diff --git a/xos/attic/agentportmapping_model.py b/xos/attic/agentportmapping_model.py
new file mode 100644
index 0000000..d499bd2
--- /dev/null
+++ b/xos/attic/agentportmapping_model.py
@@ -0,0 +1 @@
+def __unicode__(self): return u'%s-%s-%s' % (self.access_agent.name, self.port, self.mac)