test(pubsub): increase ordering key test timeout (#4584)

From discussion with @kamalaboulhosn, increasing the test timeout for this ordering key test should help with flakiness.

Fixes #3626

pubsub/integration_test.go

@@ -1188,7 +1188,6 @@ func TestIntegration_OrderedKeys_Basic(t *testing.T) {
 }
 
 func TestIntegration_OrderedKeys_JSON(t *testing.T) {
-	t.Skip("https://github.com/googleapis/google-cloud-go/issues/3626")
 	ctx := context.Background()
 	client := integrationTestClient(ctx, t, option.WithEndpoint("us-west1-pubsub.googleapis.com:443"))
 	defer client.Close()
@@ -1283,8 +1282,8 @@ func TestIntegration_OrderedKeys_JSON(t *testing.T) {
 
 	select {
 	case <-done:
-	case <-time.After(60 * time.Second):
-		t.Fatal("timed out after 60s waiting for all messages to be received")
+	case <-time.After(5 * time.Minute):
+		t.Fatal("timed out after 5m waiting for all messages to be received")
 	}
 
 	mu.Lock()