Disable child pipelines triggered from forks

Sometimes, developers have developer access to the pipeline repos, but not (yet) for a kernel repo. In this case, the parent pipeline runs in the fork, and successfully triggers the child pipelines in the pipeline repos. As the webhooks are only registered in the parent project, they are not notified of pipeline events, which leads to hard-to-diagnose error conditions.

Make that a bit more clear by blocking the parent pipeline running in a fork from triggering the child pipelines.

Signed-off-by: Michael Hofmann mhofmann@redhat.com