[VOL-4632] Adding NniDhcpTrapVid to support FTTB usecase

Change-Id: I3e7c4fdb7cc3872a489faa4ef1de80d51bc56887
diff --git a/internal/bbsim/api/grpc_api_server.go b/internal/bbsim/api/grpc_api_server.go
index 2500cdd..20fc525 100644
--- a/internal/bbsim/api/grpc_api_server.go
+++ b/internal/bbsim/api/grpc_api_server.go
@@ -117,13 +117,14 @@
 	}
 
 	res := bbsim.Olt{
-		ID:            int32(olt.ID),
-		SerialNumber:  olt.SerialNumber,
-		OperState:     olt.OperState.Current(),
-		InternalState: olt.InternalState.Current(),
-		IP:            oltAddress,
-		NNIPorts:      nnis,
-		PONPorts:      pons,
+		ID:             int32(olt.ID),
+		SerialNumber:   olt.SerialNumber,
+		OperState:      olt.OperState.Current(),
+		InternalState:  olt.InternalState.Current(),
+		IP:             oltAddress,
+		NNIPorts:       nnis,
+		PONPorts:       pons,
+		NniDhcpTrapVid: int32(olt.NniDhcpTrapVid),
 	}
 	return &res, nil
 }