[AppVeyor] Sort out problem with msbuild and configuration on server-side for NUnit tests
[AppVeyor] Sort out problem with msbuild and configuration on server-side for NUnit tests

bridgedotnet/Bridge,AndreyZM/Bridge,AndreyZM/Bridge,bridgedotnet/Bridge,AndreyZM/Bridge,bridgedotnet/Bridge,bridgedotnet/Bridge,AndreyZM/Bridge