modify mvc-dispatcher-servlet.xml password
add file CategoryCOntrollerTest
add CategoryController
init CategoryControllerTest
add test should_return_categoryList method
add getCategories method
add test should_return_category_when_input_id method
add getCategory method
add test should_delete_category_when_input_id method
add deleteCategory method
add test should_insert_category method
add insertCategory method
add test should_update_category method
add updateCategory method