testing: Reduce runtime of all tests that use SQLite databases by storing them in ramfs

testing/tests/sql/multi-level-ca/posttest.dat

@@ -4,7 +4,3 @@ dave::ipsec stop
 moon::iptables-restore < /etc/iptables.flush
 carol::iptables-restore < /etc/iptables.flush
 dave::iptables-restore < /etc/iptables.flush
-moon::rm /etc/ipsec.d/ipsec.*
-carol::rm /etc/ipsec.d/ipsec.*
-dave::rm /etc/ipsec.d/ipsec.*
-~