Require working IPv4 on all job nodes
Require working IPv4 on all job nodes

We're seeing nodes IPv6 nodes occasionally come up with no working
IPv4 connectivity to the Internet. Declare that we require IPv4
configuration and egress connectivity so these nodes will be
discarded before they cause jobs expecting to be able to reach
v4-only resources to fail.

Change-Id: I5ebf008998b62f044d0a686de8a2337851ef3cf8
Depends-On: https://review.opendev.org/763065

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