* try to upgrade to 2017
* fix common props files
* upgrade ToolsVersion in all project files
* couple forgotten 14.0->15.0
* Updated CodeCov.ps1 to VS2017. Updated nuget.exe to 4.0.
* Turned off code analysis warnings as errors for test projects.
* Fixing code analysis warnings.
* Fixed additional code analysis warnings.
* More code analysis warning fixes.
* update EnvDTE to use NuGet
* One more warning suppression.
* disable code analysis for Test projects
Sergey Kanzhelev
mafletch