Web Assignment 3
                
                Please add the ability to list/show Supplier
                
                You will need to code/configure:
                
                a Servlet
                a list Suppliers jsp
                a show Supplier jsp
                edit the index.jsp to add the link to list Suppliers jsp
                
                I want to see all the Supplier details
                
                On the show Supplier jsp, I want to see a list of Products
                for the Supplier, I want to see a link from the displayed
                Product to the show Product jsp to see the details for
                the Product
                
                On the show Product jsp, I want a link from the Supplier id
                field to the show Supplier jsp to see the details for the 
                Supplier of that Product
                
                Warning!!! to get showSupplier to run
                I need to call doPost() in the SupplierServelt
                and pass a field named "supplier"
                containing the SupplierId
                
                If I make a link, then I am running doGet()
                so how do I get a form post submit on
                a "link" type field                
                
                I cheat... I use JavaScript
                in showProduct.jsp, I have:
                
                <span id="supplierId" class="bigger underline">
                   <a onclick="submitPost('SupplierServlet', 'supplier', ${product.supplierId})">
                        ${product.supplierId}</a></span>
                <span>(Click to see Supplier)</span>
                
                your SupplierDAO will need a method to findAllSuppliers
                and a method to findSupplierById
                
                your ProductDAO will need a method to findProductsBySupplier
                
                your Supplier Entity class must be written and tested
                
                REMEMBER: If you edit an Entity or Action class you must run
                    Maven Install to rebuild the jar file needed 
                    by the web project
                    
                As a "starter" I will share a JavaScript file that
                offers a Form POST and a GET link, you can use in your code
                see: utility.js
                
                
                Optional:
                can you add the ability from the show page for the User to
                get back to the list page?