testing: Avoid delays with ping by using -W and -i options

With -W we reduce timeouts when we don't expect a response.  With -i the
interval between pings is reduced (mostly in case of auto=route where
the first ping yields no reply).

testing/tests/ikev2/mult-auth-rsa-eap-sim-id/evaltest.dat

@@ -18,4 +18,4 @@ moon::cat /var/log/daemon.log::EAP method EAP_SIM failed for peer 22806012345600
 moon::ipsec status 2> /dev/null::rw-mult.*ESTABLISHED.*[email protected]::NO
 dave::cat /var/log/daemon.log::received EAP_FAILURE, EAP authentication failed::YES
 dave::ipsec status 2> /dev/null::home.*ESTABLISHED::NO
-dave::ping -c 1 PH_IP_ALICE::64 bytes from PH_IP_ALICE: icmp_req=1::NO
+dave::ping -c 1 -W 1 PH_IP_ALICE::64 bytes from PH_IP_ALICE: icmp_req=1::NO