pubsub: skip TestIntegration_OrderedKeys_JSON

This test is flaking in the continuous build.

Updates #1872

Change-Id: I301d070449fdbc87ead147f23870c94c766874df
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/55890
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Tyler Bui-Palsulich <tbp@google.com>
Reviewed-by: Cody Oss <codyoss@google.com>
diff --git a/pubsub/integration_test.go b/pubsub/integration_test.go
index 64ad47e..8c0ef17 100644
--- a/pubsub/integration_test.go
+++ b/pubsub/integration_test.go
@@ -1168,6 +1168,7 @@
 }
 
 func TestIntegration_OrderedKeys_JSON(t *testing.T) {
+	t.Skip("Flaky, see https://github.com/googleapis/google-cloud-go/issues/1872")
 	ctx := context.Background()
 	client := integrationTestClient(ctx, t)
 	defer client.Close()