Fix PHPCS error.
Fix typo in foreign key SQL.

Also cause truncations to cascade in postgres. Not cascading truncation
causes postgres to error out when trying to clean up fixture data.
Enforce specific ordering to fix failing tests.

With the addition of foreign key constraints some ordering changes
occur, this solidifies the ordering of results.
Fix truncate tests for postgres.
Fix issues with postgres.

Enabling constraints in postgres after dropping tables makes postgres
grumpy. It seems to work much better without the enable foreign keys
call. Foreign keys will be re-disabled, and then enabled on the
subsequent test method that inserts fixtures.