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

testing/tests/sql/ip-split-pools-db/posttest.dat

@@ -1,7 +1,3 @@
 carol::ipsec stop
 dave::ipsec stop
 moon::ipsec stop
-moon::rm /etc/ipsec.d/ipsec.*
-carol::rm /etc/ipsec.d/ipsec.*
-dave::rm /etc/ipsec.d/ipsec.*
-~