Add initial TKM integration test

A connection between the hosts moon and sun is set up. The host moon
uses the Trusted Key Manager (TKM) and is the initiator of the transport
connection. The authentication is based on X.509 certificates.

testing/tests/tkm/host2host-initiator/pretest.dat

@@ -0,0 +1,10 @@
+moon::rm /etc/ipsec.secrets
+moon::tkm_cfgtool -c /etc/tkm/tkm.conf -i /etc/ipsec.conf -t /etc/tkm/tkm.bin -s /usr/local/share/tkm/tkmconfig.xsd
+moon::cat /etc/ipsec.conf
+moon::tkm_keymanager -c /etc/tkm/tkm.bin -k /etc/tkm/moonKey.der -r /etc/tkm/strongswanCert.der >/tmp/tkm.log 2>&1 &
+moon::expect-file /tmp/tkm.rpc.ike
+moon::DAEMON_NAME=charon-tkm ipsec start
+sun::ipsec start
+sun::expect-connection host-host
+moon::DAEMON_NAME=charon-tkm expect-connection conn1
+moon::DAEMON_NAME=charon-tkm ipsec up conn1