[python-win32] wmi, Win32_ScheduledJob and Execution User

[Roger Upole]

The Win32_ScheduledJob class represents "AT Service" jobs,
and doesn't support running under a specific user.  When you access
the job via the Scheduled Tasks api, it's actually converted to the
newer task format.

You can use the ITaskScheduler interface to directly create and
manipulate scheduled tasks.  There are some demos in
\win32comext\taskscheduler\test\ showing how it's used.

          Roger