Add a .gitreview file.
Add a .gitreview file.

Change-Id: I2ff3a4f19829aec841235326597fb8793c5065f8
Reviewed-on: https://review.openstack.org/20724
Reviewed-by: Elizabeth Krumbach <5ab9cdb82979a5e22201150e8d4ff9f187271b68@princessleia.com>
Approved: Dan Prince <62cccc0004df0a8e3c343b26b69e434f6aa9711c@redhat.com>
Reviewed-by: Dan Prince <62cccc0004df0a8e3c343b26b69e434f6aa9711c@redhat.com>
Tested-by: Jenkins

openstack-infra/reviewday,dprince/reviewday,openstack-infra/reviewday