testing: Print triplets.dat files of clients in EAP-SIM scenarios

References #1078.

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

@@ -5,6 +5,8 @@ alice::cat /etc/freeradius/clients.conf
 alice::cat /etc/freeradius/eap.conf
 alice::cat /etc/freeradius/proxy.conf
 alice::cat /etc/freeradius/triplets.dat
+carol::cat /etc/ipsec.d/triplets.dat
+dave::cat /etc/ipsec.d/triplets.dat
 alice::radiusd
 moon::ipsec start
 carol::ipsec start