changed truncate to delete
afterFind event in AR is now called after relations have been populated

fixes #1993
reworked fix for #1993
removed phpdoc about nonexisting param
changelog added
fixed test break
Merge pull request #1995 from Ragazzo/fix_for_fixture_controller

changed truncate to delete
Merge pull request #1997 from cebe/1993-fixed-ar-afterFind

afterFind event in AR is now called after relations have been populated