testing: Add ikev2/compress-nat scenario

testing/tests/ikev2/compress-nat/hosts/bob/etc/ipsec.conf

@@ -0,0 +1,24 @@
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev2
+	dpdaction=restart
+	dpddelay=60s
+	leftfirewall=yes
+	lefthostaccess=yes
+
+conn hub
+	leftcert=bobCert.pem
+	leftid=bob@strongswan.org
+	leftsubnet=10.2.0.0/16
+	right=PH_IP_CAROL
+	rightid=carol@strongswan.org
+	rightsubnet=PH_IP_CAROL/32,10.1.0.0/16
+	compress=yes
+	auto=add

testing/tests/ikev2/compress-nat/hosts/bob/etc/strongswan.conf

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+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+  load = curl aes des sha1 sha2 md5 pem pkcs1 gmp random nonce x509 revocation hmac xcbc stroke kernel-netlink socket-default updown
+}