add base havana config file for core projects

Change-Id: I9087c8a9250263526bfc49a2d3d0e44f8dd628a6
Reviewed-on: https://review.openstack.org/29692
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Approved: Sean Dague <sean@dague.net>
Tested-by: Jenkins