seba-328 - better error handling

Change-Id: I42f28ea4b003ce4619516852d9ce74db3916179a
diff --git a/models/physical/olt.go b/models/physical/olt.go
index c800ad5..321c895 100644
--- a/models/physical/olt.go
+++ b/models/physical/olt.go
@@ -42,6 +42,7 @@
 	CLLI           string
 	Hostname       string
 	Address        net.TCPAddr
+	Driver         string
 	Number         int
 	Ports          []PONPort
 	Active         bool