Move custom configurations management to dedicated tasksets

[jpiron]

This allows to use the tasks_from parameter of the import_role module.
For instance, one could run something like :

- name: "Create Traefik fail2ban configuration."
  import_role:
    name: ansible-fail2ban
    tasks_from: copy_custom_configurations
  become: True
  vars:
    fail2ban_filterd_path: "{{ traefik_fail2ban_filterd_path }}"
    fail2ban_actiond_path: "{{ traefik_fail2ban_actiond_path }}"
    fail2ban_jaild_path: "{{ traefik_fail2ban_jaild_path }}"

from a Traefik playbook to just add Traefik specific Fail2ban configuration
without reconfiguring everything.

[jonathanpiron]

Hi,

I just rebased this MR against the master branch.
Let me know if there is something I need to add.