Whether or not the state of a test database should be serialized can be
inferred from the set of databases allowed to be access from discovered
TestCase/TransactionTestCase enabling the serialized_rollback feature
which makes this setting unnecessary.
This should make a significant test suite bootstraping time difference
on large projects that didn't explicitly disable test database
serialization.
Chris Jerdonek
Simon Charette
Baptiste Mispelon
François Freitag
Jon Dufresne
Will Ayd
Tim Graham