added bad case dave to ikev2/rw-eap-sim-radius scenario

testing/tests/ikev2/rw-eap-sim-radius/posttest.dat

@@ -1,5 +1,7 @@
 moon::ipsec stop
 carol::ipsec stop
+dave::ipsec stop
 alice::/etc/init.d/radiusd stop
 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