GCP: If default network is not available in a project, cld env create is failing

[vikomall]

In GCP, running into following issue if the default network is not avaiable.

cld env create env-gke environment-gke.yaml
cld env list
{
"data": [
{
"env_definition": "{u'environment': {u'app_deployment': {u'project': uproject-name', u'type': u'gke', u'target': u'gcloud', u'zone': u'us-central1-b'}}}",
"location": "/Users/xxx/.cld/data/deployments/environments/env-gke-2017-12-01-05-05-24",
"name": "env-gke",
"output_config": "{'error': '<HttpError 400 when requesting https://container.googleapis.com/v1/projects/project-name/zones/us-central1-b/clusters?alt=json returned "(1) network "default" does not exist.\n\t(2) Network "default" has no route to the default internet gateway. To fix this, add a route with destRange \'0.0.0.0/0\' and nextHopGateway \'default-internet-gateway\'.">'}",
"status": "create-failed"
}
]
}