2.4 delete all regression

Fix deleteAll with postgres regression as discussed in #2421

> This seems to break croogo tests with postgres: https://travis-ci.org/rchavik/croogo/builds/15111575
> Tested with one commit prior to this: https://travis-ci.org/rchavik/croogo/builds/15111445 which seem fine
> The @markstory suggested to have an order clause for the find, even if to disable the default sort