RFR: pr: filter external commands in CommandWorkItem

[Jorn Vernee]

On Wed, 8 Jul 2020 10:09:41 GMT, Erik Helin <ehelin at openjdk.org> wrote:

> Hi all,
> 
> please review this patch that ensures that `CommandWorkItem` correctly filters out external commands when looking for
> commands to process in a pull request.
> Testing:
> - [x] Added a new unit test
> - [x] `make test` passes on Linux x64
> 
> Thanks,
> Erik

Marked as reviewed by jvernee (Reviewer).

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PR: https://git.openjdk.java.net/skara/pull/695