Build result based on the current step results

[Vlatombe]

On top of #11

Also picks up jenkinsci/junit-plugin#282

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue

[timja]

LGTM, will also introduce a checks api integration by the looks of it.

Will integrate, do some more refresh, some testing then cut a release