VOL-2006 update voltha-api-server to use go mod

Change-Id: Ic9cce461175dd08cc4f30ddda2172640e8928b00
diff --git a/cmd/arouter/arouter.go b/cmd/arouter/arouter.go
index 952fc7b..abea7b0 100644
--- a/cmd/arouter/arouter.go
+++ b/cmd/arouter/arouter.go
@@ -21,6 +21,7 @@
 	"github.com/opencord/voltha-api-server/internal/pkg/afrouter"
 	"github.com/opencord/voltha-go/common/log"
 	"github.com/opencord/voltha-go/common/version"
+	_ "github.com/opencord/voltha-protos"
 	"google.golang.org/grpc/grpclog"
 	slog "log"
 	"os"