Do not consider owners of Public-Plugins as plugin maintainers

Core maintainers are owners of the Public-Plugins project to grant them
permission to submit changes on plugin projects where either no
maintainers are available or don't have sufficient time to review
all contributions. Though core maintainers should not be marked as
maintainers of such plugins. Instead core maintainers should be added
as owners directly on the project where they feel responsible for
maintenance like e.g. core plugins.

Issue: Issue 12805
Change-Id: Ifd8b50c6a0b9bdfc8a26cadac89f2b7669c58af2
2 files changed