nodepool: pause ovh
nodepool: pause ovh

It seems to be seeing network issues, such as Ansible timing out
trying to connect to the machine and the VMs failing to hit 1.1.1.1
to resolve hosts such as git.openstack.org on node startup.

Change-Id: Id4af1ec98899afd1f2e55ad7b7bd397ceca43a62

openstack-infra/project-config,openstack-infra/project-config