CORD-1177: Brought vOLT service over to xproto

Change-Id: Ia80b9bef655302694d7a48fde2aa16d04ae657a5
diff --git a/xos/attic/accessdevice_model.py b/xos/attic/accessdevice_model.py
new file mode 100644
index 0000000..88c7d5f
--- /dev/null
+++ b/xos/attic/accessdevice_model.py
@@ -0,0 +1 @@
+def __unicode__(self): return u'%s-%d:%d' % (self.volt_device.name,self.uplink,self.vlan)