Fix etcd restart and handler systemd tasks

Changed Wants=docker.service to docker.socket

Renamed handlers for reloading systemd to contain role in task name.

roles/network_plugin/calico/handlers/main.yml

@@ -2,15 +2,15 @@
 - name: restart calico-node
   command: /bin/true
   notify:
-    - reload systemd
-    - reload calico-node
+    - Calico | reload systemd
+    - Calico | reload calico-node
 
-- name : reload systemd
+- name : Calico | reload systemd
   shell: systemctl daemon-reload
   when: ansible_service_mgr == "systemd"
 
-- name: reload calico-node
+- name: Calico | reload calico-node
   service:
     name: calico-node
     state: restarted
-    sleep: 10
+    sleep: 10

roles/network_plugin/calico/templates/calico-node.service.j2

@@ -1,8 +1,8 @@
 [Unit]
 Description=Calico per-node agent
 Documentation=https://github.com/projectcalico/calico-docker
-Wants=docker.service etcd-proxy.service
 After=docker.service etcd-proxy.service
+Wants=docker.socket
 
 [Service]
 User=root