Use systemd module instead of command

This patch changes the use of systemctl via the command module
over to the Ansible systemd module.

One conditional check for systemd was removed since all supported
distributions deployed by OSA have systemd.

Change-Id: I926e94d185f4999e13b33f7d035b9dd5cf732f0b
(cherry picked from commit ad29910e6c)

tasks/install_zypper.yml

@@ -95,7 +95,8 @@
     - rabbitmq-config
 
 - name: Reload the systemd daemon
-  command: "systemctl daemon-reload"
+  systemd:
+    daemon_reload: yes
   when:
     - rabbitmq_server_service_added | changed
   tags:

tasks/rabbitmq_install.yml

@@ -22,17 +22,15 @@
     - rabbitmq_server-install
 
 - name: Reload the systemd daemon
-  command: "systemctl daemon-reload"
+  systemd:
+    daemon_reload: yes
   when:
     - install_rabbitmq | changed
-    - ansible_service_mgr == 'systemd'
   tags:
     - rabbitmq-apt-packages
     - rabbitmq-yum-packages
     - rabbimtq-zypper-packages
     - rabbitmq_server-install
-    # Avoid ANSIBLE0006 systemctl used in place of systemd module issue
-    - skip_ansible_lint
 
 - name: Ensure there are no policy-rc files
   file:

tasks/rabbitmq_post_install.yml

@@ -42,8 +42,6 @@
     group: "root"
     owner: "root"
     mode: "0755"
-  when:
-    - ansible_service_mgr == 'systemd'
   tags:
     - rabbitmq-config
 
@@ -64,8 +62,6 @@
     src: "limits.conf.j2"
     dest: "/etc/systemd/system/rabbitmq-server.service.d/limits.conf"
   register: rabbit_resource_limit
-  when:
-    - ansible_service_mgr == 'systemd'
   tags:
     - rabbitmq-config
 
@@ -74,15 +70,13 @@
     src: systemd-restart-on-failure.conf.j2
     dest: "/etc/systemd/system/rabbitmq-server.service.d/systemd-restart-on-failure.conf"
   register: rabbit_restart_on_failure
-  when:
-    - ansible_service_mgr == 'systemd'
   tags:
     - rabbitmq-config
 
 - name: Reload the systemd daemon
-  command: "systemctl daemon-reload"
+  systemd:
+    daemon_reload: yes
   when:
-    - ansible_service_mgr == 'systemd'
     - rabbit_resource_limit | changed
     - rabbit_restart_on_failure | changed
   tags: