Update _config.php

fixed application config for unit test
fix buildin php bug https://bugs.php.net/bug.php?id=66606
changelog
Merge pull request #2681 from dizews/buildin-phpserver-fix

fix bug of php buildin webserver https://bugs.php.net/bug.php?id=66606
Merge pull request #2680 from ZhandosKz/patch-1

fixed application config for unit test