Integrated: 1814: Add logic to allow bot run Backport Command

[Zhao Song]

On Wed, 8 Feb 2023 22:48:50 GMT, Zhao Song <zsong at openjdk.org> wrote:

> In [SKARA-1797](https://bugs.openjdk.org/browse/SKARA-1797), the bot might issue /backport command when the pr is integrated. 
> 
> However, in the very first of Backport Command, the bot would check whether the command user is in the census. The bot itself is not in the census, so the command issued by the bot would fail.
> 
> In this patch, I added the logic to explicitly allow bot run `/backport` command in closed pr or commits.

This pull request has now been integrated.

Changeset: 6e97d991
Author:    Zhao Song <zsong at openjdk.org>
URL:       https://git.openjdk.org/skara/commit/6e97d991b531f04f77e7b4243890a152c1d84eb1
Stats:     3 lines in 3 files changed: 0 ins; 1 del; 2 mod

1814: Add logic to allow bot run Backport Command

Reviewed-by: erikj

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PR: https://git.openjdk.org/skara/pull/1468