Jenkins in monorepo with multiple multibranch pipeline jobs

### Describe your use-case which is not covered by existing documentation.

I have a GitHub monorepo setup. There is a seed job that monitors a build
configuration file when new projects are added to a repo. The seed job will create
new multibranch pipeline job for that project. Thus the monorepo has
multiple multibranch jobs. Each job only runs when files are updated in its
project.
I have a couple of questions.

1. I noticed that the Jenkins GitHub Check does not always show the
correct status or job for that repo. Should each job have its own unique GitHub Status
name?


2. With this setup, each pull request can have one or more jobs running
at once. GitHub branch protection rule requires selecting the check stat=
us
needed to check in. Since each PR will have different jobs, then cannot
select any specific job. Is there a plugin that will aggregate status
checks across multiple jobs?

### Reference any relevant documentation, other materials or issues/pull requests that can be used for inspiration.

I havent been able to find any documentation on how to configure a scenario where a repo has multiple jobs running. Not sure if I missed anything.

e.g. This PR shows the Jenkins Check as green but some of the jobs seems to fail.

https://github.com/NemProject/nem/pull/56