add DISCOVERY_CONTAINER_REGISTRY role to create-gcp-service-account.sh
add DISCOVERY_CONTAINER_REGISTRY role to create-gcp-service-account.sh

simonsdave/cloudfeaster-services,simonsdave/cloudfeaster-services,simonsdave/cloudfeaster_infrastructure,simonsdave/cloudfeaster_infrastructure,simonsdave/cloudfeaster-services,simonsdave/cloudfeaster_infrastructure,simonsdave/cloudfeaster_infrastructure