* Switch to kubeadm deployment mode

Discuss:https://github.com/kubernetes-incubator/kubespray/issues/3301

* Add non-kubeadm upgrage to kubeadm cluster

* Add resource-container flag to kube-proxy manifest

* add resourceContainer: "" to kubeadm kube-proxy configs

* failed

* version_compare

* succeeded

* skipped

* success

* version_compare becomes version since ansible 2.5

* ansible minimal version updated in doc and spec

* last version_compare

* Upgrade kubernetes to v1.12.0

Use kubeadm v1alpha3 config

* Upgrade coredns and etcd

* Upgrage docker to 18.06

Move kube_kubeadm_controller_extra_args to controllerManagerExtraArgs section. It was placed in controllerManagerExtraVolumes

https://kubernetes.io/blog/2018/07/11/dynamic-kubelet-configuration/

1.fix audit log not write
2.fix Parameter not recognized
3.delete kubedm futuregates auditing and use apiServerExtraArgs

Define apiserver flags directly instead of relying on auditPolicy section in order to have the ability to redirect audit log to stdout with kubeadm

Nginx LB(default)
Other LB by kubeadm controlplane

Upgrade Kubernetes to V1.11.2
The kubeadm configuration file version has been upgraded from v1alpha1 to v1alpha2
Add bootstrap kubeadm-config.yaml with external etcd

* Upgrade k8s to 1.10.2

Bumped etcd version to 3.2.16 as recommended

* Add ipvs fix for v1.10

* change flannel addons test to ha