testing: Add a failing client to the ikev2/rw-eap-tls-only scenario

testing/tests/ikev2/rw-eap-tls-only/hosts/dave/etc/strongswan.conf

@@ -0,0 +1,16 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+swanctl {
+  load = pem pkcs1 x509 revocation constraints pubkey openssl random
+}
+
+charon-systemd {
+  load = random nonce aes md5 sha1 sha2 pem pkcs1 curve25519 mgf1 gmp x509 curl revocation hmac kdf gcm vici kernel-netlink socket-default eap-tls updown
+
+  multiple_authentication=no
+  syslog {
+    daemon {
+      tls = 2
+    }
+  }
+}