Revert "Overrides toString in class Customer"

This reverts commit 3317a0250ef61a9c8c10332d8b25a551f3590481.
Revert "Revert "Overrides toString in class Customer""

This reverts commit 724a59b1ee928fce50ba6566f6342eaa62b32446.
Rewirte printListOfCustomer in class WebShop