Adapt test configurations

Adapt test configurations to the new Debian-based system.

testing/tests/ikev2/mobike/hosts/alice/etc/ipsec.conf

@@ -10,7 +10,7 @@ conn %default
 	keyexchange=ikev2
 
 conn mobike
-	left=PH_IP_ALICE1
+	left=192.168.0.50
 	leftcert=aliceCert.pem
 	leftid=alice@strongswan.org
 	right=PH_IP_SUN

testing/tests/ikev2/mobike/hosts/sun/etc/ipsec.conf

@@ -14,6 +14,6 @@ conn mobike
 	leftcert=sunCert.pem
 	leftid=@sun.strongswan.org
 	leftsubnet=10.2.0.0/16
-	right=PH_IP_ALICE1
+	right=192.168.0.50
 	rightid=alice@strongswan.org
 	auto=add