Incremental e2e test uses terraform instead of scripts (#1094)
Incremental e2e test uses terraform instead of scripts (#1094)

- Avoid export DB_* variables that are required by ./scripts/migrate
- Avoid deployment failure caused by newly added service: when a new service is added, just call ./scripts/deploy would fail due to newly created service in Cloud Run cannot be zero traffic
google/exposure-notifications-server,google/exposure-notifications-server,google/exposure-notifications-server