fix etcd configuration for nodes

fix wrong calico checksums

using a var name etcd_bin_dir

fix etcd handlers for sysvinit

using a var name etcd_bin_dir

sysvinit script

review etcd configuration

move /etc/hosts configuration in 'preinstall' role

Use IP is specified, otherwise use the ansible discovered address.

This fixes cases for use in Vagrant environments.

Add set remote user

run_once only works if master[0] is first in inventory list of all nodes

of all nodes.

Localhost dnsmasq

Change hyperkube repo

Flannel running as pod

Fix calico with systemd