Update solum core-team
Update solum core-team

Change-Id: I9a2ee6a6b8324ba4ecba99bf87844344d59b9bda

cp16net/reviewstats,JohnGarbutt/reviewstats,openstack-infra/reviewstats,cp16net/reviewstats,JohnGarbutt/reviewstats,openstack-infra/reviewstats