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.

This follows pull request #1677, adding the cgroup-driver
autodetection also for kubeadm way of deploying.

Info about this and the possibility to override is added to the docs.

Allow setting cgroup driver for kubelet

Red Hat family platforms run docker daemon with `--exec-opt
native.cgroupdriver=systemd`. When kubespray tried to start kubelet
service, it failed with:

Error: failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: "cgroupfs" is different from docker cgroup driver: "systemd"

Setting kubelet's cgroup driver to the correct value for the platform
fixes this issue. The code utilizes autodetection of docker's cgroup
driver, as different RPMs for the same distro may vary in that regard.

Also fix usage of failed_when and handling exit code.

New files: /etc/kubernetes/admin.conf
           /root/.kube/config
           $GITDIR/artifacts/{kubectl,admin.conf}

Optional method to download kubectl and admin.conf if
kubeconfig_lcoalhost is set to true (default false)

* just use public_ip in creating gce temporary waitfor hosts

* Update create-gce.yml