* Fixes#2534 by replacing expensive WMI query with Win32 API calls
* fix break on unix build
* added tests for #2535
* although test passed, fixing exception that shows up
* fixed Describe text
* addressing code review feedback
* addressing review feedback to comment on why sleep is needed
added check that test processes are created before we try to kill them
* fixed test to timeout and pending fix for #2561
* Rename Publish-EchoArgs to Publish-PSTestTools so it can be used
for other tools as well in the future
* Publish EchoArgs to the bin directory instead of run to match
convention
* Add source URL to EchoArgs header comment
* Use wildcard of "*.nuget.props" to match
"test/csharp/csharp.nuget.props" in .gitignore