Revert to 20170303-elevated (#695)
Revert to 20170303-elevated (#695)

This is just to unblock until elevation issue on 20170531 is fixed
dotnet/dotnet-ci,tannergooding/dotnet-ci,tannergooding/dotnet-ci,mmitche/dotnet-ci,dotnet/dotnet-ci,mmitche/dotnet-ci