treesvc: Do not provide credentials unless TLS is used

4f413fe86e was perfect, except it did the opposite of what we needed.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/services/tree/cache.go

@@ -99,7 +99,7 @@ func dialTreeService(ctx context.Context, netmapAddr string) (*grpc.ClientConn,
 		),
 	}
 
-	if netAddr.IsTLSEnabled() {
+	if !netAddr.IsTLSEnabled() {
 		opts = append(opts, grpc.WithTransportCredentials(insecure.NewCredentials()))
 	}