up codeception config

* set @fixtures alias
move files to another folder
up Category tests

* make fixture file
* load fixtures
up UsedItem tests

* make fixture file
* up tests
up UsedItemType tests

* make fixture file
* load fixtures
make PhotoFixture file
up UsedItemPhoto model

* name must be set
add PhpbbUserFixture file
up UsedItemFixture file

* path was incorrect
up CategoryTest
up PhpbbUserTest
up UsedItemPhotoTest
up UsedItemTest
up sandbox