added ikev2/rw-eap-sim-only-radius scenario

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

@@ -0,0 +1,6 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = curl aes des sha1 sha2 md5 pem pkcs1 gmp random x509 hmac xcbc stroke kernel-netlink fips-prf eap-sim eap-sim-file updown
+  send_vendor_id = yes
+}