Logging from django.db.backends is VERY verbose, send to null

Fix logical error in confition
Fixes: #PRD-1620

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Disable dashboard debug, it is too verbose

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Merge pull request #529 from bogdando/fix_prd1620

Logging from django.db.backends is VERY verbose, send to null