Fix flannel for 1.6 and apply fixes to enable containerized kubelet

roles/dnsmasq/tasks/main.yml

roles/docker/templates/docker-options.conf.j2

...tes-apps/ansible/templates/netchecker-agent-hostnet-ds.j2

...r/templates/manifests/kube-controller-manager.manifest.j2

...tes/master/templates/manifests/kube-scheduler.manifest.j2

roles/kubernetes/node/defaults/main.yml

roles/kubernetes/node/templates/kubelet.j2

roles/kubernetes/preinstall/handlers/main.yml