Move git01.openstack.org to a new server

This moves git01.openstack.org to a new server, but should not be
merged until the old one is gracefully offlined in haproxy and the
new one is in sync with Gerrit replication and has been thoroughly
tested.

Change-Id: I84a3b2710edd96087a29735ca26863c75eb5023d
Merge "Move git01.openstack.org to a new server"