added ITA Scanner IMC/IMV pair to tnccs-20 and tnccs-20-block scenarios

testing/tests/tnc/tnccs-20-block/posttest.dat

@@ -4,3 +4,4 @@ dave::ipsec 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
+dave::/etc/init.d/apache2 stop 2> /dev/null