Skip calc test on AppVeyor.
Skip calc test on AppVeyor.

Looks like there are windows bugs.
https://answers.microsoft.com/en-us/windows/forum/apps_windows_10-winapps/windows-10-calculator-app-fails-to-start/26298c02-0512-4a4b-b3b8-cf7391e55be0?auth=1
Not an important test.

JohanLarsson/Gu.Wpf.UiAutomation