Add pseudo network plugin called "cloud" to use cloud provider for network

Allow to let the cloud provider configure proper routing for nodes.

roles/kubernetes/master/templates/manifests/kube-controller-manager.manifest.j2

@@ -27,6 +27,11 @@ spec:
     - --cloud-config={{ kube_config_dir }}/cloud_config
 {% elif cloud_provider is defined and cloud_provider == "aws" %}
     - --cloud-provider={{cloud_provider}}
+{% endif %}
+{% if kube_network_plugin is defined and kube_network_plugin == 'cloud' %}
+    - --allocate-node-cidrs=true
+    - --configure-cloud-routes=true
+    - --cluster-cidr={{ kube_pods_subnet }}
 {% endif %}
     livenessProbe:
       httpGet: