TBR: lib/discovery/test: disable TestDirectoryRoaming

https://github.com/vanadium/build/issues/83

Change-Id: I375ae87b3211c61242589f6f42034df0a140fc9f
diff --git a/lib/discovery/test/directory_test.go b/lib/discovery/test/directory_test.go
index 8b2422b..237c144 100644
--- a/lib/discovery/test/directory_test.go
+++ b/lib/discovery/test/directory_test.go
@@ -92,6 +92,7 @@
 }
 
 func TestDirectoryRoaming(t *testing.T) {
+	t.Skip("v.io/i/1351")
 	ctx, shutdown := test.V23Init()
 	defer shutdown()