Fixed Update button in Products page

[kliu57]

Closes #48

Problem:

products page update button does not work

Cause:

• when the update button in products page is clicked, it triggers updateproduct() in AdminController.java

  • updateproduct() creates a new "productsUpdate" ModelAndView and adds a product object and list of category objects to the ModelAndView
  • the resulting ModelAndView is displayed to the user

• the ModelAndView can be found in productsUpdate.jsp

  • the code <c:forEach var="product" items="products"> is causing the error to be thrown since it should be items="${products}" and not a string

• there is no need for the forEach loop since we never add a list of products to the ModelAndView, only one product object
  • keeping the forEach loop results in blank page, since we never pass in a list of products

Fix:

• in productsUpdate.jsp, removed the forEach loop completely, since we add one product to the view and not a list of products

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Testing