Exporting PPPoE stats from ONOS

Change-Id: I031b9e747e77ecf4220238c0f27d7618851da7e0
diff --git a/main.go b/main.go
index 81b1635..46f6df0 100644
--- a/main.go
+++ b/main.go
@@ -108,6 +108,16 @@
 	prometheus.MustRegister(onosaaaRxUnknownserver)
 	prometheus.MustRegister(onosaaaRequestRttMillis)
 	prometheus.MustRegister(onosaaaRequestReTx)
+
+	prometheus.MustRegister(onosPppoeUpTermBytes)
+	prometheus.MustRegister(onosPppoeUpTermPackets)
+	prometheus.MustRegister(onosPppoeUpDropBytes)
+	prometheus.MustRegister(onosPppoeUpDropPackets)
+	prometheus.MustRegister(onosPppoeUpControlPackets)
+	prometheus.MustRegister(onosPppoeDownRxBytes)
+	prometheus.MustRegister(onosPppoeDownRxPackets)
+	prometheus.MustRegister(onosPppoeDownTxBytes)
+	prometheus.MustRegister(onosPppoeDownTxPackets)
 }
 
 func loadConfigFile() Config {