Add initialize method and its name reader
Add empty menu array, add menu items, retrieve menu items, change parameter from item to name
Add happy hour setter method and passed test
Change from attr_reader to getter/setter methods for happy discount
Modify getter and setter methods to only return a discount when happy_hour? is true
Modify setter method to only return a value between 0-1
Add code and test to determine if it is happy hour
Add method and passed test to only apply discount during happy hour