Make role multiplatform

- On debian 11 strongswan daemon has different name
- Make config file backups when overwriting
- Add closeaction configuration option
- More metadata fixes
- Change tests to run standalone

Change-Id: I04474cb4601060059c4e603560d1873ad6598a77
diff --git a/templates/ipsec.conf.j2 b/templates/ipsec.conf.j2
index 67f4e6c..0bf4a67 100644
--- a/templates/ipsec.conf.j2
+++ b/templates/ipsec.conf.j2
@@ -23,6 +23,7 @@
     reauth={{ strongswan_conf_reauth }}
     type=tunnel
     dpdaction={{ strongswan_conf_dpdaction }}
+    closeaction={{ strongswan_conf_closeaction }}
 
 {% for conn in strongswan_conf_connections %}
 conn {{ conn.name }}