Update Stats problems

Update Stats has the following functions:

• Runs logman to update job statistics and history.
• Extends the Preproduction plan if its length is shorter than minLen.

In case of failure:

• Rerun the job or manually run "logman <file> " on the latest schedlog file.
• If it does not run, the statistics and history will be partial. Preproduction plan is updated at the beginning of MakePlan .

How to stop it:

• Kill the job or logman process, the statistics and history will be partial until the job or logman is rerun.