updated ikev1/xauth-rsa scenario to xauth plugin

testing/tests/ikev1/xauth-rsa/hosts/carol/etc/ipsec.secrets

@@ -2,4 +2,4 @@
 
 : RSA carolKey.pem "nH5ZQEWtku0RJEZ6"
 
-: XAUTH carol "4iChxLT3" 
+carol@strongswan.org : XAUTH "4iChxLT3" 

testing/tests/ikev1/xauth-rsa/hosts/carol/etc/strongswan.conf

@@ -0,0 +1,11 @@
+# /etc/strongswan.conf - strongSwan configuration file
+
+pluto {
+  load = sha1 sha2 md5 aes des hmac pem pkcs1 x509 gmp random curl xauth
+}
+
+# pluto uses optimized DH exponent sizes (RFC 3526)
+
+libstrongswan {
+  dh_exponent_ansi_x9_42 = no
+}