Merge branch 'backports' into 'newinfra'

[baie] Add extension to backports apt list file

See merge request !51

roles/baie/tasks/main.yml

 ---
 - name: Configure Debian backports repository
   template:
-    src: apt/sources.list.d/backports.j2
-    dest: /etc/apt/sources.list.d/backports
+    src: apt/sources.list.d/backports.list.j2
+    dest: /etc/apt/sources.list.d/backports.list
 
 - name: Install ZFS
   apt: