RFR: forge: add builder for HostUser

[Robin Westberg]

On Mon, 19 Oct 2020 13:01:25 GMT, Erik Helin <ehelin at openjdk.org> wrote:

> Hi all,
> 
> please review this patch that adds "builder" for the class `HostUser`. The builder also generalizes the concept of
> fetching missing information for a `HostUser` so that any username, id and full name now can fetched lazily.
> Thanks,
> Erik

Looks good!

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Marked as reviewed by rwestberg (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/890