Add summit.openstack.org to OpenStack infra

Add summit.openstack.org to OpenStack infrastructure. The current host
used is an old forgotten 11.04 cloudserver from pre-Foundation days.
We'll need to move summit.openstack.org A/CNAME to this new instance.

This host will be fully automated with its own Puppet module sometimes
during Havana, but for the urgent Portland summit setup it will be set
up manually.

Change-Id: I80a46e5969c27e540278a51d176a536e7777f005
Reviewed-on: https://review.openstack.org/21302
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins