"dnu publish" should restore for wrapper projects before building them

[ChengTian]

@davidfowl

Today when doing dnu publish, we implicitly "no-source" wrapper projects. That is, for a project.json wrapping a csproj, we always build nupkg from it, no matter --no-source option was given or not.

However, there is no dnu restore being done before we call dnu publish. So when you dnu publish a project referencing a wrapped csproj, building the wrapper project will be failed.

Or we want to call dnu restore during dnu wrap?

[ChengTian]

I suggest that we restore during dnu publish instead of dnu wrap because only the publishing scenario needs a lock file.

[sayedihashimi]

Looking forward to the fix in beta8. Please let me know if this moves out as its impacting VS scenarios.