testing: Migrate MOBIKE tests to vici

Note that the mobike-nat test has been removed as it basically did the same
as the mobike-virtual-ip-nat test.  Instead, the mobike-nat-mapping scenario
is added, which simulates a NAT router restart.

testing/tests/ikev2/mobike/pretest.dat

@@ -0,0 +1,9 @@
+alice::ifup eth1
+alice::iptables-restore < /etc/iptables.rules
+sun::iptables-restore < /etc/iptables.rules
+sun::ip route add 10.1.0.0/16 via PH_IP_MOON
+alice::systemctl start strongswan
+sun::systemctl start strongswan
+alice::expect-connection mobike
+sun::expect-connection mobike
+alice::swanctl --initiate --child mobike 2> /dev/null