Move git02.openstack.org to a new server

This moves git02.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: I8d0cc04ac6429a7780020242c9cc1ff2f0126b6e
Merge "Move git02.openstack.org to a new server"