Bump kubespray to bring kubernetes v1.18.5

Additional container image repository, kube_image, repo, is taken into
use by upstream Kubespray so this change adds that into Kubespray generated
vars file for offline deployments to ensure those images are pulled
from engine.local as well.

Depends-On: I7bc9f42fd5bb6a29d4dd16d9e56228dde58fd498
Change-Id: Ie8be93ba62dc90229f54bd618c982aeaf4bdaafb
3 files changed