Fix lint + Remove network role (unused)

.lint/ansible-lint.conf

library/nmcli.py

playbooks/bench-monitoring.yml

playbooks/celerity.yml

playbooks/mediacache.yml

playbooks/mediaimport.yml

playbooks/mediaserver.yml

playbooks/mediavault/deploy.yml

playbooks/mediavault/ressources/add_backup_task.yml

playbooks/mediaworker.yml

playbooks/mirismanager.yml

playbooks/netcapture.yml

playbooks/postgres.yml

playbooks/tests/data-partition.yml

playbooks/tests/ressources/firewall/listen.yml

playbooks/tests/ressources/firewall/test-rule.yml

roles/letsencrypt/tasks/main.yml

roles/lxc/tasks/main.yml

roles/mediaimport/tasks/main.yml

roles/mediavault/tasks/mailer.yml