testing: Improve runtime of TNC tests by storing the SQLite DB in ramfs

This saves about 50%-70% of the time needed for scenarios that use a DB.

testing/tests/tnc/tnccs-11-radius-pts/posttest.dat

@@ -3,7 +3,7 @@ carol::ipsec stop
 dave::ipsec stop
 alice::killall radiusd
 alice::rm /etc/freeradius/sites-enabled/inner-tunnel-second
-alice::rm /etc/pts/config.db
+alice::umount /etc/pts
 carol::echo 1 > /proc/sys/net/ipv4/ip_forward
 moon::iptables-restore < /etc/iptables.flush
 carol::iptables-restore < /etc/iptables.flush

testing/tests/tnc/tnccs-11-radius-pts/pretest.dat

@@ -5,6 +5,9 @@ carol::echo 0 > /proc/sys/net/ipv4/ip_forward
 dave::echo aabbccddeeff11223344556677889900 > /var/lib/dbus/machine-id
 alice::ln -s /etc/freeradius/sites-available/inner-tunnel-second /etc/freeradius/sites-enabled/inner-tunnel-second
 alice::cat /etc/freeradius/sites-enabled/inner-tunnel-second
+alice::mv /etc/pts/data1.sql /tmp/
+alice::mount -t ramfs -o size=5m ramfs /etc/pts
+alice::mv /tmp/data1.sql /etc/pts/
 alice::sed -i "s:DEBIAN_VERSION:\`cat /etc/debian_version\`:" /etc/pts/data1.sql
 alice::cd /usr/local/share/strongswan/templates/database/imv; cat tables.sql data.sql /etc/pts/data1.sql | sqlite3 /etc/pts/config.db
 alice::LEAK_DETECTIVE_DISABLE=1 LOG4CXX_CONFIGURATION=/etc/tnc/log4cxx.properties radiusd