fix circleci config (#3)

Author: alexander-fenster

packages/google-cloud-bigquery-datatransfer/.circleci/config.yml

@@ -154,6 +154,7 @@ jobs:
           name: Run system tests.
           command: npm run system-test
           environment:
+            GCLOUD_PROJECT: long-door-651
             GOOGLE_APPLICATION_CREDENTIALS: .circleci/key.json
       - run:
           name: Remove unencrypted key.