RFR: 673: PR author should be able to use /reviewers command [v3]

[Erik Helin]

On Tue, 15 Sep 2020 12:52:47 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Erik Helin has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Simplify code based on reviewer feedback
>
> bots/pr/src/main/java/org/openjdk/skara/bots/pr/ReviewersCommand.java line 111:
> 
>> 109:         }
>> 110:
>> 111:         if (pr.author().equals(command.user()) && !censusInstance.isReviewer(command.user())) {
> 
> Maybe simplify this to just `! isReviewer`? Including the test for `is author` doesn't really add value (removing it
> seems to better reflect the intent and might be safer / more future proof).

No, we don't want people who are _not_ the PR author and who are _not_ Reviewers to be able to increase the required
number of reviewers. Allowing that makes it possible to harass pull request by e.g. registering a spam account and just
drop a bunch `/reviewers 9` in a number of PRs.

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PR: https://git.openjdk.java.net/skara/pull/820