In commit e245c0bad4 we updated the Rocky
template only. We have Queens deployments that also requires this
functionality. Pike is the extant template to affect Queens.
In order to have nova-metadata-api use the same dns-domain as neutron
when nova-metadata-api runs on nova-cloud-controller we must recieve
the dns-domain on the neutron-api relation.
Change-Id: I9364cf57664695b08411cc3c6a101e132ea58cc7
Partial-Bug: #1805645