Reset tasks specific to a network_plugin moved inside its role directory + Reset tasks specific to cilium

Upstream Changes:

-   cert-manager 0.4.1 (https://github.com/jetstack/cert-manager/releases/tag/v0.4.1)

Our Changes:

-   Better templates sync with upstream manifests
-   Remove fancy resources requests/limits customization

Upstream Changes:

-   ingress-nginx 0.18.0 (https://github.com/kubernetes/ingress-nginx/releases/tag/nginx-0.18.0)

* Disable locksmithd on CoreOS if coreos_auto_upgrade set to false

* change when format to support multiple-condition

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

The post-remove action fails during the kubectl delete node action because with rc: 2, command not found. The kubectl is not in the system PATH and the full path to the binary is required

* Update local-volume-provisioner-ds.yml.j2

After v1.10.2 default mountPropagation is "None"

* local_volume_provisioner version bump

v2.1.0 uses the beta nodeAffinity API by default which is available starting 1.10

* Update local-volume-provisioner-ds.yml.j2

MY_NAMESPACE env

* Update README.md

Raw block devices docs.

* kubedns & kubedns-autoscaler: Stick to master nodes.

 - Tolerate only master nodes and not any NoSchedule taint
 - Pods are on different nodes
 - Pods are required to be on a master node.

* kubedns: use soft nodeAffinity.

Prefer to be on a master node, don't require.

* coredns: Stick to (different) master nodes.

     - Pods are on different nodes
     - Pods are preferred to be on a master node.

Update all configs to current upstream state.
Add more resources (unable to pass tests now)...

Use helm install or support in future

Upstream Changes:

-   weave 2.4.0 (https://github.com/weaveworks/weave/releases/tag/v2.4.0)
-   Support `externalTrafficPolicy: Local` (https://github.com/weaveworks/weave/issues/2924)
-   Make the ipset list size bigger (https://github.com/weaveworks/weave/pull/3305)
-   Break out of kube rm-peers loop if nothing changes (https://github.com/weaveworks/weave/pull/3317)

Our Changes:

-   Revamp weave-net.yml.j2 with upstream changes
-   Add more variables for customization
-   Replace WEAVE_PASSWORD with k8s secret
-   Remove hard-corded seed mode support, in favor of variables customization

Upstream Changes:

-   ingress-nginx 0.17.1 (https://github.com/kubernetes/ingress-nginx/releases/tag/nginx-0.17.1)
-   Remove duplicated `securityContext` (https://github.com/kubernetes/ingress-nginx/pull/2705)
-   Remove --publish-service flag, in favor of DaemonSet + hostPort

Close #2998
Close #2999

Upstream Changes:

-   cert-manager 0.4.0 (https://github.com/jetstack/cert-manager/releases/tag/v0.4.0)

According to cluster/binary.yml vault binary will be placed to `{{ bin_dir }}` and according to `inventory/sample/group_vars/all.yml` that is 
`inventory/sample/group_vars/all.yml`

Even without this PR, the operation works well.
However, it is better to use a single slash rather than
a double slash in the path.

This fixes #3014

apiserver cert should be created only once