Bootstrap OWNERS files for the repository In order to satisfy the blunderbuss and approvers plugins for the k8s CI systems we are about to adopt, we need to add OWNERS files to directories in Origin. The files contain reviewers and approvers for the directory. Reviewers are members that blunderbuss will assign pull requests to; approvers are members from whom an LGTM is necessary to merge a pull request that touches files in the directory. The inital values in these OWNERS files are generated by looking at the most active contributors to any directory. The top ten most active contributors to a directory are listed as reviewers; the top five most active contributors that have merge rights with the current system are listed as approvers. Signed-off-by: Steve Kuznetsov <skuznets@redhat.com> (commit: 4f5da06)