Fix gcloud breaking changes

[Bekt]

Release notes: https://cloud.google.com/sdk/release_notes

• The 0.9.88 gcloud release comes with breaking changes that affects this project (see circle.yml. Replace sudo $GCLOUD --quiet preview app run app.yaml --project=invatar0 with '/bin/dev_appserver.py .`
• Remove app from sudo $GCLOUD --quiet components update app app-engine-python