RFR: SKARA-758: Add /check pull request command

[Kartik Ohri]

On Tue, 24 Nov 2020 16:08:44 GMT, Robin Westberg <rwestberg at openjdk.org> wrote:

>> @rwestberg Yes, please. I plan to keep contributing in the future and having such a setup will help me to explore and understand the code much more quickly and in a better way. Hence, I think setting it up will be worth it. Thanks again for the help.
>
> Sure, let's start with the required setup for running tests against GitHub (or GitLab) then! You can pass `-Pcredentials=/path/to/credentials.json` where the file contains something like this:
> 
> {
>     "type": "github",
>     "host": "https://github.com",
>     "project": "rwestberg/skara-integration",
>     "namespace": "github.com",
>     "apps": [
>         {
>             "key": "certificates/sbot.private-key.pkcs8.pem",
>             "id": "12837",
>             "installation": "195957"
>         },
>         {
>             "key": "certificates/sbot2.private-key.pkcs8.pem",
>             "id": "18848",
>             "installation": "379295"
>         },
>         {
>             "key": "certificates/sbot3.private-key.pkcs8.pem",
>             "id": "19394",
>             "installation": "397926"
>         }
>     ]
> }
> 
> Most tests require two or three different accounts in order to simulate various interactions, so that's why there are a list of them. Each account credential corresponds to a GitHub app that you can create on your account. The `id` can be seen after creating the app, the `installation` value can be found after the app is installed on your account. Finally, the key is the private key you associate with the GitHub app. The path is relative to the .json file. Note that it has to be in PEM format, you'll have to convert the file you get from GitHub.

I have created the 3 Github Apps and generated the .json file as you instructed. How should I proceed ?

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PR: https://git.openjdk.java.net/skara/pull/954