Move set_facts to kubespray-defaults defaults

Don't delegate cert gathering before creating admin.conf

These facts can be generated in defaults with a performance
boost.

Also cleaned up duplicate etcd var names.

Increase vagrant vm's memory size

* Test if tokens are expired from host instead of inside container

* Update main.yml

Insert a newline in bastion ssh config after ProxyCommand conditional

Improve playbook example of integration document

Fixes #1716

Fix system namespace creation
Only rotate tokens when necessary

Also fix yaml lint issues

Fixes #1703

* Enable upgrade to kubeadm

* fix kubedns upgrade

* try upgrade route

* use init/upgrade strategy for kubeadm and ignore kubedns svc

* Use bin_dir for kubeadm

* delete more secrets

* fix waiting for terminating pods

* Manually enforce kube-proxy for kubeadm deploy

* remove proxy. update to kubeadm 1.8.0rc1

use command module instead of shell module

upgrading from weave version 2.0.1 to 2.0.4

drop unused etcd logic

* feature: install project atomic CSS on RedHat family

* missing patch for this feature

* sub-role refactor

* Yamllint fix

Signed-off-by: Junaid Ali <junaidali.yahya@gmail.com>

Fixes #1666

Set correct kubelet cgroup-driver also for kubeadm deployments

Fixes #1660

The value cannot be determined properly via local facts, so
checking k8s api is the most reliable way to look up what hostname
is used when using a cloudprovider.