VOL-3978 - update to go 1.16.3

Change-Id: I3bc24ba662517badac4ddb238930550624c408a6
diff --git a/vendor/github.com/opencord/voltha-protos/v4/go/extension/extensions.pb.go b/vendor/github.com/opencord/voltha-protos/v4/go/extension/extensions.pb.go
index e6ebe01..ea6b404 100644
--- a/vendor/github.com/opencord/voltha-protos/v4/go/extension/extensions.pb.go
+++ b/vendor/github.com/opencord/voltha-protos/v4/go/extension/extensions.pb.go
@@ -10,6 +10,8 @@
 	empty "github.com/golang/protobuf/ptypes/empty"
 	config "github.com/opencord/voltha-protos/v4/go/ext/config"
 	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
 	math "math"
 )
 
@@ -1918,6 +1920,17 @@
 	SetExtValue(context.Context, *SingleSetValueRequest) (*SingleSetValueResponse, error)
 }
 
+// UnimplementedExtensionServer can be embedded to have forward compatible implementations.
+type UnimplementedExtensionServer struct {
+}
+
+func (*UnimplementedExtensionServer) GetExtValue(ctx context.Context, req *SingleGetValueRequest) (*SingleGetValueResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetExtValue not implemented")
+}
+func (*UnimplementedExtensionServer) SetExtValue(ctx context.Context, req *SingleSetValueRequest) (*SingleSetValueResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SetExtValue not implemented")
+}
+
 func RegisterExtensionServer(s *grpc.Server, srv ExtensionServer) {
 	s.RegisterService(&_Extension_serviceDesc, srv)
 }