* Add kubeadm option to etcd_deployment_type to replace the etcd_kubeadm_enabled variable

Signed-off-by: necatican <necaticanyildirim@gmail.com>

* Add etcd kubeadm deployment documentation

Signed-off-by: necatican <necaticanyildirim@gmail.com>

* Refactor warning for the deprecated 'etcd_kubeadm_enabled' variable

Signed-off-by: necatican <necaticanyildirim@gmail.com>

* Move proxy_env to kubespray-defaults/defaults

There is no reasons to use set_facts here

Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

* Ensure kubeadm doesn't use proxy

*_proxy variables might be present in the environment (/etc/environment, bash profile, ...)
When this is the case we end up with those proxy configuration in /etc/kubernetes/manifests/kube-*.yaml manifests

We cannot unset env variables, but kubeadm is nice enough to ignore empty vars
https://github.com/kubernetes/kubernetes/blob/93d288e2a47fa6d497b50d37c8b3a04e91da4228/cmd/kubeadm/app/util/env.go#L27



Signed-off-by: Etienne Champetier <e.champetier@ateme.com>

no_proxy is a pain to get right, and having proxy variables present causes issues
(k8s components get proxy configuration after upgrade, see #7100)

It's better to only configure what require proxy:
- the runtime (containerd/docker/crio)
- the package manager + apt_key
- the download tasks

Tested with the following clusters
- 4 CentOS 8 nodes
- 1 Ubuntu 20.04 node

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

tags are not inherited for include_role therefore the change
from include to import

Co-authored-by: Hans Feldt <hafe@users.noreply.github.com>

* assembly fallback_ips and no_proxy var only one time on localhost and populate result on all hosts

* add tag always, fix ansible lint errors

* workaround to mitogen issue dw/mitogen#663

* do not gather fact before install python on coreos like distros

* try to pass docker molecule test

* Adding yaml linter to ci check

* Minor linting fixes from yamllint

* Changing CI to install python pkgs from requirements.txt

- adding in a secondary requirements.txt for tests
- moving yamllint to tests requirements