Some tests falsely expecting fixed ordering randomly fail when ran with PostgreSQL. Expectations need to be updated so that order returned from database does not affect the tests (aka: apply sorting before assertions).

Some of the failures:
https://travis-ci.org/ezsystems/ezpublish-kernel/jobs/12265843
https://travis-ci.org/ezsystems/ezpublish-kernel/jobs/12408286
https://travis-ci.org/ezsystems/ezpublish-kernel/jobs/12095371
https://travis-ci.org/ezsystems/ezpublish-kernel/jobs/12265843
https://travis-ci.org/ezsystems/ezpublish-kernel/jobs/12238878
https://travis-ci.org/ezsystems/ezpublish-kernel/jobs/12336873