Define User class using TDD

[ameeramer]

• [x] get_id: returns id of user.
• [x] get_name: returns the user's name.
• [x] get_phone: returns user phone.
• [x] get_email: returns user email.
• [x] update_phone: updates user phone.
• [x] update_email: updates user email.
• [x] newAvailableParkingLot: adds a new available parking lot
• [x] rent_parkingLot(parkingLot_id): rents one of the user's available parkingLots.
• [x] order_parkingLot(parkingLot_id): order a new available ParkingLot.
• [x] add iteration over available, rented and ordered parkingLots
• [x] equals and hashCode