use ansible_service_mgr to detect init system

roles/etcd/handlers/main.yml

@@ -7,7 +7,7 @@
 
 - name: reload systemd
   command: systemctl daemon-reload
-  when: init_system == "systemd"
+  when: ansible_service_mgr == "systemd"
 
 - name: reload etcd
   service:

roles/etcd/tasks/configure.yml

@@ -4,7 +4,7 @@
     src: etcd.service.j2
     dest: /lib/systemd/system/etcd.service
     backup: yes
-  when: init_system == "systemd"
+  when: ansible_service_mgr == "systemd"
   notify: restart etcd
 
 - name: Configure |  Write etcd  initd script
@@ -13,7 +13,7 @@
     dest: /etc/init.d/etcd
     owner: root
     mode: 0755
-  when: init_system == "sysvinit" and ansible_os_family == "Debian"
+  when: ansible_service_mgr in ["sysvinit","upstart"] and ansible_os_family == "Debian"
   notify: restart etcd
 
 - name: Configure |  Create etcd config file