Adds tripleo-core group to have rights on puppet-tripleo project. The
rights of puppet-manager-core group are kept. This project contains
Puppet code, but is solely used from the TripleO installer, so sometimes
it's not easy to find puppet-manager-core folks to do reviews for this
project to allow dependent changes in TripleO to land. We'd like to
share the permissions on this repository between the two core groups to
expand the number of interested core reviewers and allow an easier
progress on the TripleO Puppet work. The gerritbot is already set up to
notify both IRC channels.
Change-Id: I1f91f851b5800fdf69697fdd88fbd9e41349f6d1
9613d973c8