output url so when test fails you can more easily troubleshoot

test/powershell/Installer/WindowsInstaller.Tests.ps1

@@ -9,13 +9,13 @@ Describe "Windows Installer" -Tags "Scenario" {
             @{ Name = "WMF 5.1"; Url = "https://www.microsoft.com/download/details.aspx?id=54616" }
         )
     }
-        
+
     It "WiX (Windows Installer XML) file contains pre-requisites link $preRequisitesLink" {
         $wixProductFile = Join-Path -Path $PSScriptRoot -ChildPath "..\..\..\assets\Product.wxs"
         (Get-Content $wixProductFile -Raw).Contains($preRequisitesLink) | Should Be $true
     }
 
-    It "Pre-Requisistes link for '<Name>' is reachable" -TestCases $linkCheckTestCases -Test {
+    It "Pre-Requisistes link for '<Name>' is reachable: <url>" -TestCases $linkCheckTestCases -Test {
         param ($Url)
 
         # Because an outdated link 'https://www.microsoft.com/download/details.aspx?id=504100000' would still return a 200 reponse (due to a redirection to an error page), it only checks that it returns something