k8s: add deployment stages for canaries and production

Including two new command line options to be able to test the changes
in prod without affecting current behavior until the functionality is
stable.

Also fixed a small bug that prevented the K8s from running in a
non-initialized env

Change-Id: I63d4990178163a7332826734e56063ede7825ad3
4 jobs for k8s-deploy-to-all-namespaces in 1 minute and 54 seconds (queued for 2 seconds)