Look into reusing Postgres database to speed up test suite

[thcrock]

For ease, Triage configures the testing module ( https://github.com/tk0miya/testing.postgresql ) using the easy method of re-instantiating the database each time. It advertises a way to cache it, potentially speeding up our builds by a lot. However, when I intially introduced the library, I tried that option and couldn't get it to work. I gave up on it pretty quickly, because our test suite was small then. Now, it takes 50 minutes to run and it's probably worth seeing if we can get that to work and see what the test speedup would be.