Version library fixes for Win2k3 non-existent GetProductInfo API, misplaced GetSystemMetrics API calls, irregular characters in Win2k3, Win2k8 WMI test validation
Service manager tests move to optional as short-term CI reliability improvement
Add more explanation in test comments on OS idiosyncrasies around OS version information
Merge pull request #752 from opscode/adamed/ci-failure-windows

Windows versions library and service_manager test reliability issues across versions of Windows