testing: Add ha/active-passive-multi-ke scenario

testing/tests/ha/active-passive-multi-ke/hosts/moon/etc/strongswan.conf

@@ -0,0 +1,16 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon-systemd {
+  load = random nonce openssl pem pkcs1 curl revocation vici kernel-netlink socket-default ha ml
+
+  plugins {
+    ha {
+      local = PH_IP_MOON1
+      remote = PH_IP_ALICE
+      secret = PliyxREnfoPaSXDJx1NrlH0kkKXT/LWZ
+      segment_count = 1
+      fifo_interface = yes
+      monitor = yes
+    }
+  }
+}