ForceFixtureReload forces reloading of all test fixtures.

LoadFixtures wipes out and resets the test database, loading all of the fixtures we use for unit and intergration tests.

DropOrder lists tables to be dropped, in the order they should be dropped so we don't violate foreign key constraints.

HasNoIDColumn lists tables that have no identity column.

LoadOrder lists the names of tables for which we have fixture data (csv files) in the order they should be loaded.

SafeEnvironments lists which APT_ENV environments are safe for data loading.