This reverts commit d554d74bf0.
This change is very problematic, because then the volumes will no longer be able to have API operations work on them, since the volumes are tied to a host, so when that host it down, things are bad.
We should keep this old (non-clean behaviour) and switch towards using Cinder clusters instead https://docs.openstack.org/cinder/latest/contributor/high_availability.html
This means configuring a few other things, but this is a really bad change and will break production deployments. I suggest we revert ASAP.
Change-Id: Iee54ef5feca5c8bee80aded75d2fd182a431adb3
6a5466e9a4