Adapt test configurations

Adapt test configurations to the new Debian-based system.

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

@@ -2,7 +2,7 @@ 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
+venus::/etc/init.d/isc-dhcp-server 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