added new scenarios

testing/tests/ikev2/double-nat-net/hosts/alice/etc/ipsec.conf

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+	strictcrlpolicy=no
+	plutostart=no
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev2
+		
+conn nat-t
+	left=%defaultroute
+	leftcert=aliceCert.pem
+	leftid=alice@strongswan.org
+	leftfirewall=yes
+	right=PH_IP_SUN
+	rightid=bob@strongswan.org
+	rightsubnet=10.2.0.0/16
+	auto=add

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

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+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+	strictcrlpolicy=no
+	plutostart=no
+
+conn %default
+	ikelifetime=60m
+	keylife=20m
+	rekeymargin=3m
+	keyingtries=1
+	keyexchange=ikev2
+
+conn nat-t
+	left=%defaultroute
+	leftsubnet=10.2.0.0/16
+	leftcert=bobCert.pem
+	leftid=bob@strongswan.org
+	leftfirewall=yes
+	right=%any
+	rightsubnet=10.1.0.0/16
+	auto=add