feat(updating reregisterallhooks method): only register parent, not all children

[dgutzmann]

Instead of trying to register a webhook for each child job in a multibranch-pipeline project, only
register the base project.

With many multibranch pipelines and many prs/branches per project, the total number of calls to github (in my case github enterprise) can become very large and cause rate limiting/abuse rate limiting to be reached

[atsharp]

LGTM

[jglick]

No particular opinion; did not realize this plugin even registered hooks to begin with. github-branch-source also does so, though this style should probably be considered deprecated: better to use an App which automatically receives webhooks for anything it is installed on.

[dgutzmann]

No particular opinion; did not realize this plugin even registered hooks to begin with. github-branch-source also does so, though this style should probably be considered deprecated: better to use an App which automatically receives webhooks for anything it is installed on.

I haven't really used the github-branch-source approach via the github app yet, possibly a better solution in general for auto scanning repos and such.

I was having other issues and I followed this guide and that is when I came across the

Re-register hooks for all jobs

button and saw that it had an issue with the child jobs...

[jglick]

FYI jenkinsci/github-branch-source-plugin#289, still on my back burner.