Mvc: WebApplicationFactory should provide a virtual Dispose() method

[martincostello]

The WebApplicationFactory<T> class in Microsoft.AspNetCore.Mvc.Testing should provide the standard protected virtual void Dispose(bool disposing) method to allow derived classes to override the method to dispose of resources they might create themselves.

[mkArtakMSFT]

Thanks for reporting this issue. We agree that this seems to be a bug and we've assigned one of our team members to look into this based on its priority.

[martincostello]

I can do a PR to add this for 2.1.0 if wanted? Otherwise in 2.2.0 would it be a breaking change to the public contract?

[rynowak]

Feel free to send us a pr, that would be helpful 👍

[martincostello]

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