Refactor variable names in cron.yml for consistency and clarity

roles/common/tasks/cron.yml

@@ -1,7 +1,7 @@
 ---
 - name: (cron.yml) Define candidate paths for root crontab PATH
   ansible.builtin.set_fact:
-    cron_root_path_candidates:
+    common_cron_root_path_candidates:
       - /root/bin/admin-stuff
       - /root/bin
       - /usr/local/apache2/bin
@@ -18,16 +18,16 @@
 - name: (cron.yml) Check candidate paths for root crontab PATH
   ansible.builtin.stat:
     path: "{{ item }}"
-  loop: "{{ cron_root_path_candidates }}"
+  loop: "{{ common_cron_root_path_candidates }}"
-  register: cron_root_path_stats
+  register: common_cron_root_path_stats
   tags:
     - user_crontab
 
 - name: (cron.yml) Build validated root crontab PATH
   ansible.builtin.set_fact:
-    cron_root_path: >-
+    common_cron_root_path: >-
       {{
-        cron_root_path_stats.results
+        common_cron_root_path_stats.results
         | selectattr('stat.exists')
         | map(attribute='stat.path')
         | join(':')
@@ -38,7 +38,7 @@
 - name: (cron.yml) Check if root crontab already exists
   ansible.builtin.stat:
     path: /var/spool/cron/crontabs/root
-  register: root_crontab_file
+  register: common_root_crontab_file
   tags:
     - user_crontab
 
@@ -69,10 +69,10 @@
       # at 5 a.m every week with:
       # 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
       #
-      PATH={{ cron_root_path }}
+      PATH={{ common_cron_root_path }}
       SHELL=/bin/bash
   when:
-    - not root_crontab_file.stat.exists
+    - not common_root_crontab_file.stat.exists
   tags:
     - user_crontab