* Upgrade to kubernetes v1.8.0

hyperkube no longer contains rsync, so now use cp

* Enable node authorization mode

* change kube-proxy cert group name

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.

Updates based on feedback

Simplify checks for file exists

remove invalid char

Review feedback. Use regular systemd file.

Add template for docker systemd atomic

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>

kubelet lost the ability to load kernel modules.  This
puts that back by adding the lib/modules mount to kubelet.

The new variable kubelet_load_modules can be set to true
to enable this item.  It is OFF by default.

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>