retrace: Parameterise over CentOS versions

Allow for Retrace Server to support multiple versions of CentOS via
the `rs_internal_centos_vers` variable.

roles/abrt/retrace-post/defaults/main.yml

@@ -1,9 +1,12 @@
 ---
 
-# List of fedora versions for reposync
+# List of Fedora versions for reposync
 rs_internal_fedora_vers: [33, 34, rawhide]
 rs_internal_fedora_vers_removed: [24, 25, 26, 27, 28, 29, 30, 31, 32]
 
+# List of CentOS versions for reposync
+rs_internal_centos_vers: [7, 8]
+
 # List of architectures for reposync
 # armhfp disabled untill we get more space
 rs_internal_arch_list: [x86_64]

roles/abrt/retrace-post/tasks/cron.yml

@@ -17,13 +17,14 @@
     state: absent
   loop: "{{ rs_internal_fedora_vers_removed | product(rs_internal_arch_list) | list }}"
 
-- name: Create retrace-server reposync cron job for CentOS 7
+- name: Create retrace-server reposync cron jobs for CentOS
   cron:
-    name: "rs reposync centos 7 x86_64"
+    name: "rs reposync centos {{ item }} x86_64"
     user: retrace
-    job: "/usr/bin/retrace-server-reposync centos 7 x86_64 >> /var/log/retrace-server/reposync_error.log 2>&1"
+    job: "/usr/bin/retrace-server-reposync centos {{ item }} x86_64 >> /var/log/retrace-server/reposync_error.log 2>&1"
     special_time: daily
     state: present
+  loop: "{{ rs_internal_centos_vers }}"
 
 - name: Create retrace-server cleanup cron job
   cron:

roles/abrt/retrace-post/tasks/retrace_setup.yml

@@ -10,7 +10,8 @@
   when: env != 'staging'
 
 - name: reposync for centos
-  shell: nohup retrace-server-reposync centos 7 x86_64 </dev/null >$(mktemp /tmp/ansible.reposync_for_centosXXXXXX.log) &
+  shell: nohup retrace-server-reposync centos {{ item }} x86_64 </dev/null >$(mktemp /tmp/ansible.reposync_for_centosXXXXXX.log) &
+  loop: "{{ rs_internal_centos_vers }}"
   become: yes
   become_user: retrace
   tags: [rs_reposync, rs_fedora]