up MarketPlace controller

* set user id directly
up UsedItem test

* throw exception if user_is is not set
up UsedItemPhoto test
up UsedItem test

* add validation test
* add save test
* add edit test
up UsedItemType test

* add validation test
* add save test
* add edit test
Add SignInFormTest
Add SignUpFormTest
up back button
up ItemViewPageCept