Disable a failing test case in AppVeyor daily test run

[daxian-dbw]

See https://ci.appveyor.com/project/PowerShell/powershell-f975h

 [-] New-Service with bad parameters will fail for 'badstarttype' where 'StartupType' = 'System' 78ms
   Expected string length 66 but was 13. Strings differ at index 0.
   Expected: {CouldNotNewService,Microsoft.PowerShell.Commands.NewServiceCommand}
   But was:  {No Exception!}
   -----------^
   at line: 65 in C:\projects\powershell-f975h\test\tools\Modules\HelpersCommon\HelpersCommon.psm1
   65:             $_.FullyQualifiedErrorId | Should Be $FullyQualifiedErrorId | Out-Null

It's tracked by #4803. So for now we will disable the test case.