Launch Profile Initializer incorrectly reporting errors

_This issue has a corresponding [ticket on Developer Community](https://developercommunity.visualstudio.com/content/idea/1020438/launch-profile-initializer.html). Please vote and comment there to make sure your voice is heard._

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When the launchSettings.json file is missing `applicationUrl` and (I think) the .csproj is referencing the Microsoft.NET.Sdk.Web we get the following error:

> Launch Profile Initializer.
>
> Unable to parse the launchSettings.json file.


Here's an example of a failing launchSettings.json:


And here's the working one:


As you can see, the only different is the (redundant) `applicationUrl`.

It's worth noting that the lack of applicationUrl has seemingly zero effect on this ASP.NET Core app running.