RFR: 1252: Improve the output message about the command `csr`

[Guoxiong Li]

On Mon, 22 Nov 2021 14:00:08 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

>> Hi all,
>> 
>> Currently, when a user, who is not the author of the pr and is not a reviewer, uses the command `/csr unneeded`, the bot will output the message `only the pull request author and [Reviewers](https://openjdk.java.net/bylaws#reviewer) are allowed to require a CSR.`. The message is good when meeting the command `/csr` or `/csr needed` but it is not good when meeting the command `/csr unneeded` or `/csr uneeded`.
>> 
>> This patch changes the message `are allowed to require a CSR` to `are allowed to use the csr command` and adds the corresponding test cases.
>> 
>> Thanks for taking the time to review.
>> 
>> Best Regards,
>> -- Guoxiong
>
> Looks good, thanks for fixing this!

@erikj79 Thanks for your review. Could I get your help to sponsor this patch?

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PR: https://git.openjdk.java.net/skara/pull/1243