Changed from OS_PROJECT_ID to OS_PROJECT_NAME.

* Add pre-upgrade task for moving credentials file

This reverts commit 7ef9f4df.

* add python interpreter workaround for localhost

Kubernetes makes this namespace automatically, so there is
no need for kubespray to manage it.

* Added retries in pre-upgrade.yml and retries while applying kube-dns.yml

* Removed trailing spaces

This file should only be updated during kubelet upgrade so that
master components are not accidentally restarted first during
preinstall stage.

Labels from role (node-role.k8s.io/node) and labels from inventory are merged into node-labels parameter in kubelet

Addition of the .creds extension to the credentials files generated by password lookup in order for Ansible not to consider them as inventory files with inventory_ignore_extensions set accordingly (#2446)

As requested

Ensure that kube-apiserver will respond even if one of the nodes are down.

The ability to create dedicated node for ingress nginx controller
host type network for nginx controller

and add from example https://github.com/kubernetes/ingress-nginx/blob/master/docs/examples/static-ip/nginx-ingress-controller.yaml
terminationGracePeriodSeconds: 60