chore (samples) Refactoring: added invalid catalog name in import product from gcs. (#506)

* Refactoring: added invalid catalog name.

* PR fix: refactoring

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* PR fix: refactoring.

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: dfirova

java-retail/samples/interactive-tutorials/src/main/java/product/ImportProductsGcs.java

@@ -44,6 +44,10 @@ public static void main(String[] args) throws IOException, InterruptedException
     String branchName =
         String.format(
             "projects/%s/locations/global/catalogs/default_catalog/branches/0", projectId);
+    // To check error handling, use an invalid catalog in request
+    // branchName =
+    // String.format("projects/%s/locations/global/catalogs/invalid_catalog/branches/default_branch", projectId);
+
     String gcsBucket = String.format("gs://%s", System.getenv("BUCKET_NAME"));
     String gcsErrorBucket = String.format("%s/errors", gcsBucket);
     String gcsProductsObject = "products.json";