When breaking up our unit test assemblies I accidentally moved some test code to a non-unit test project.  Split the file up and moved the code back to the correct test project.

* add wallclock time

* you only need to track durations

* use sum instead

* use stopwatch

* style fixes

Don't deploy in correctness build

Documentation on how to debug our MSBuild code

This adds documentation on how to setup our MSBuild task code for an easy F5 experience.

RepoUtil usability fixes

Remove usage of TypeSwitch.