SIF execution continues after failed msbuild

[nickwesselman]

SIF continued to Unicorn deploy despite error during build:

C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Microsoft\VisualStudio\v16.0\Web\Microsoft.Web.Publishing.targets(3000,5): error : Copying file C:\dev\Hel
ix.Examples\helix-basic-unicorn\src\Foundation\Serialization\website\App_Config\Include\Unicorn\Unicorn.UI.IdentityServer.config.disabled to obj\Debug\Package\PackageTmp\App_Confi
g\Include\Unicorn\Unicorn.UI.IdentityServer.config.disabled failed. Could not find file 'C:\dev\Helix.Examples\helix-basic-unicorn\src\Foundation\Serialization\website\App_Config\
Include\Unicorn\Unicorn.UI.IdentityServer.config.disabled'. [C:\dev\Helix.Examples\helix-basic-unicorn\src\Deployment\Website\Website.csproj]
WARNING: FAILED to build "C:\dev\Helix.Examples\helix-basic-unicorn\build\..\src\Deployment\Website\Website.csproj". Please check the build log
"C:\Users\nwe\AppData\Local\Temp\Website.csp
WARNING: roj.msbuild.log" for details.