Send builder status to GitHub

[adiroiban]

Scope

This add support for reporting build result status for all builds done by Buildbot for fixing #147

Changes

I have configured GitHub status reporting in the buildbot configuration.

I have created a dedicated OAuth app in GitHub for Buildbot status
https://github.com/organizations/twisted/settings/applications/373261

I have set its logo to the Buildbot nut logo :) Feel free to suggest any other image

For testing, I got my own token... and before deploying in production I will update the private repo with the token generated for the dedicated OAuth app

How to test

You can see it in action here

• For a PR [#8495] Port twisted.conch.ssh.address to Python3 twisted/twisted#212
• For a branch comparison https://github.com/twisted/twisted/compare/8494-codecov-config

Once this hit production we will see 28 build results from buildbot

[adiroiban]

Check that start and end build messages are ok.

To actually test it we need to deploy it in production.

I can deploy it from this branch without merging it... and if there are problems I can re-deploy from master.

Please check that changes are ok. Thanks!

[rodrigc]

Since you are fixing things, might as well fix the spelling for Buildbot

[adiroiban]

I have deployed this branch in production... by manually update the private data... since I don't yet have access to the private repo.

You can see it in action here twisted/twisted#212 ... 31 status reports in total :)

[rodrigc]

I have observed successful buildbot --> GitHub integration in my PR's such as this one:
twisted/twisted#214

Thanks!

[adiroiban]

I have merged this I think that is working OK.

The unwritten review rule used to merge this is that if a PR is not reviewed in 1 week it can be merged :)