Changed from OS_PROJECT_ID to OS_PROJECT_NAME.

While `do` looks cleaner, forcing this extra option in ansible.cfg
seems to be more invasive. It would be better to keep the traditional
approach of `set dummy = ` instead.

Fix issues #2611

* Add pre-upgrade task for moving credentials file

This reverts commit 7ef9f4df.

* add python interpreter workaround for localhost

* Update etcd deployment to use correct cert and key

* Update to use admin cert for etcdctl commands

* Update handler to use admin cert too

* Only download container/file if host is in defined group

* Set correct when clause

* Fix last entries

* Update download groups

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