Work 3/20  Unit testing for items

Loaded mockery into the project; attempting to unit test items.

	modified:   api/app/controllers/BaseController.php
	modified:   api/app/controllers/ItemsController.php
	modified:   api/app/database/seeds/AccountsTableSeeder.php
	modified:   api/app/database/seeds/CartItemsTableSeeder.php
	modified:   api/app/database/seeds/CartsTableSeeder.php
	modified:   api/app/database/seeds/ItemVendorsTableSeeder.php
	modified:   api/app/database/seeds/ItemsTableSeeder.php
	modified:   api/app/database/seeds/UsersTableSeeder.php
	modified:   api/app/database/seeds/VendorsTableSeeder.php
	modified:   api/app/tests/TestCase.php
	modified:   api/app/tests/controllers/ItemsControllerTest.php
	modified:   api/composer.json