added ikev2/dhcp-dynamic scenario

testing/tests/ikev2/dhcp-dynamic/posttest.dat

@@ -0,0 +1,10 @@
+moon::ipsec stop
+carol::ipsec stop
+dave::ipsec stop
+venus::cat /var/state/dhcp/dhcpd.leases
+venus::/etc/init.d/dhcpd stop 2> /dev/null
+moon::/etc/init.d/iptables stop 2> /dev/null
+carol::/etc/init.d/iptables stop 2> /dev/null
+dave::/etc/init.d/iptables stop 2> /dev/null
+alice::arp -d 10.1.0.50
+alice::arp -d 10.1.0.51