ansible-playbooks/general#90 Change group names and adjust Ansible config for version 2.8

templates/fail2ban_jail.local.jinja2

@@ -52,7 +52,7 @@ enabled = true
 logpath = %(apache_access_log)s
           %(apache_jail_access_log)s
 {% endif %}
-{% if 'webserver-drupal' in groups and inventory_hostname in groups['webserver-drupal'] %}
+{% if 'webserver_drupal' in groups and inventory_hostname in groups['webserver_drupal'] %}
 
 [drupal-auth]
 enabled = true