split network plugins into distinct roles

roles/network_plugin/flannel/handlers/main.yml

@@ -0,0 +1,26 @@
+---
+- name: restart docker
+  command: /bin/true
+  notify:
+    - reload systemd
+    - reload docker
+    - reload kubelet
+
+- name: delete default docker bridge
+  command: ip link delete docker0
+  ignore_errors: yes
+  notify: restart docker
+
+- name : reload systemd
+  shell: systemctl daemon-reload
+  when: init_system == "systemd"
+
+- name: reload docker
+  service:
+    name: docker
+    state: restarted
+
+- name: reload kubelet
+  service:
+    name: kubelet
+    state: restarted