testing: Add expect-connection calls for all tests and hosts

There are some exceptions (e.g. those that use auto=start or p2pnat).

testing/tests/ikev2/ocsp-timeouts-unknown/pretest.dat

@@ -2,5 +2,6 @@ moon::iptables -I OUTPUT -d PH_IP_WINNETOU -p tcp --dport 80 -j REJECT --reject-
 carol::iptables -I OUTPUT -d PH_IP_WINNETOU -p tcp --dport 80 -j REJECT --reject-with tcp-reset
 moon::ipsec start
 carol::ipsec start
+moon::expect-connection rw
 carol::expect-connection home
 carol::ipsec up home