Quit Microsoft.VisualStudio.QualityTools.UnitTestFramework

[kenjiuno]

• Microsoft.VisualStudio.QualityTools.UnitTestFramework is a local assembly installed with Visual Studio 2010 Pro or such.
• dotnet build cannot find it.
• Microsoft.VisualStudio.QualityTools.UnitTestFramework can be found on nuget. However it is not officially uploaded one.
• So we need to replace it before we are moving to dotnet builder.