Adding support for canal network plugin

This patch provides support for Canal network plugin installation
as a self-hosted app, see the following link for details:

https://github.com/tigera/canal/tree/master/k8s-install

roles/kubernetes/node/tasks/main.yml

@@ -11,6 +11,13 @@
     owner: kube
   when: kube_network_plugin == "calico"
 
+- name: Write Canal cni config
+  template:
+    src: "cni-canal.conf.j2"
+    dest: "/etc/cni/net.d/10-canal.conf"
+    owner: kube
+  when: kube_network_plugin == "canal"
+
 - name: Write kubelet config file
   template: src=kubelet.j2 dest={{ kube_config_dir }}/kubelet.env backup=yes
   notify: