[postgres-tests] Fixing comments on action_tracker_notification
[postgres-tests] Removing unnecessary dependent => destroy from article_categorization
[postgres-tests] Removing duplicated test from article
[postgres-tests] Avoiding database retrieve order assumptions from article tests
[postgres-tests] Removing unnecessary dependent => destroy from category
[postgres-tests] Fixing acts_as_filesystem tests
[postgres-tests] Fixing category tests

Also removing useless methods sub_category and sub_tree.
[postgres-tests] Fixing features products block offset logic

Also fixing a test that was sort dependent.
[postgres-tests] Fixing feed_handler tests
[postgres-tests] Fixing category tests
[postgres-tests] Fixing person tests
[postgres-tests] Fixing profile tests
[postgres-tests] Fixing recent documents block tests
[postgres-tests] Fixing region tests
[postgres-tests] Fixing tasks tests
[postgres-tests] Fixing account tests
[postgres-tests] Fixing enterprise registration tests
[postgres-tests] Fixing profile controller tests
[postgres-tests] Fixing search controller tests
[postgres-tests] Fixing assets menu integration tests