testing: Add a test scenario for make-before-break reauth without a virtual IP

testing/tests/ikev2/reauth-mbb/posttest.dat

@@ -0,0 +1,4 @@
+moon::ipsec stop
+carol::ipsec stop
+moon::iptables-restore < /etc/iptables.flush
+carol::iptables-restore < /etc/iptables.flush