Refactor variable names in motd.yml for consistency and clarity

roles/common/tasks/motd.yml

@@ -6,19 +6,21 @@
 - name: (motd.yml) Check if /etc/motd.ORIG exist
   ansible.builtin.stat:
     path: /etc/motd.ORIG
-  register: motd_orig_exist
+  register: common_motd_orig_exist
 
 - name: (motd.yml) Check if /etc/motd exist
   ansible.builtin.stat:
     path: /etc/motd
-  register: motd_exist
+  register: common_motd_exist
 
 - name: (motd.yml)  Backup existing file /etc/motd
   ansible.builtin.command: cp -a /etc/motd /etc/motd.ORIG
+  changed_when: true
   when:
-    - motd_exist.stat.exists == True
-    - motd_orig_exist.stat.exists == False
+    - common_motd_exist.stat.exists
+    - not common_motd_orig_exist.stat.exists
 
 - name: (motd.yml) create /etc/motd
   ansible.builtin.shell: figlet {{ ansible_hostname }} > /etc/motd
-  when: motd_orig_exist.stat.exists == False
+  changed_when: true
+  when: not common_motd_orig_exist.stat.exists