Rollback docker 1.9

Jenkins

change tests, full path of kubectl binary

use ansible_service_mgr to detect init system

generate secrets on deployment machine

test travis with sudo=true instead of required

pin docker versions to 1.9 or earlier

Integration tests

weave network plugin

Force kube-proxy to bind to local address

split network plugins into distinct roles

fix some issues with fedora 23 and dnf

calico uses --ip option

Increase liveness timeout

add option '--nat-outgoing' for calico on clouds

install epel release for rhel

Update docker for CentOS issues in AWS and general variables

install required packages before common

roles/kubernetes/preinstall/tasks/main.yml