(kubernetes) provide first_google_boot with kube_config (#1239)
(kubernetes) provide first_google_boot with kube_config (#1239)

If the contents of your `~/.kube/config` file are passed as the instance
metadata parameter `kube_config`, and you do not specify the GKE cluster you
wish to manage with `kube_cluster`, that file's contents will be used as the
credentials to manage your kubernetes cluster with Spinnaker.
jtk54/spinnaker,spinnaker/spinnaker,spinnaker/spinnaker,spinnaker/spinnaker,jtk54/spinnaker,skim1420/spinnaker,ewiseblatt/spinnaker,duftler/spinnaker,skim1420/spinnaker,ewiseblatt/spinnaker,duftler/spinnaker,Roshan2017/spinnaker,duftler/spinnaker,skim1420/spinnaker,jtk54/spinnaker,skim1420/spinnaker,spinnaker/spinnaker,ewiseblatt/spinnaker,duftler/spinnaker,Roshan2017/spinnaker,ewiseblatt/spinnaker,Roshan2017/spinnaker