novaclient hosts has been removed in version 10

[David Lyle]

In version 10.0 of novaclient (the desired version for Queens) the support for novaclient.v2.hosts has been removed. There is an import statement in horizon to pull in that submodule. As such horizon won't work with 10.0 without resolving this.

It appears the same functionality has been remapped. Changes to remap horizon's use are required.
https://review.openstack.org/#/c/459496/4/releasenotes/notes/microversion-v2_43-76db2ac463b431e4.yaml

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/538472

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/538472
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=45442821d0864d89c78236af00abf6c8f0711053
Submitter: Zuul
Branch: master

commit 45442821d0864d89c78236af00abf6c8f0711053
Author: Akihiro Motoki <email address hidden>
Date: Sun Jan 28 02:19:44 2018 +0900

    Use nova os-services to retrieve host list

    novaclient version 10 has dropped the support for novaclient.v2.hosts.
    os-aggregates and migrateLive APIs expects host from os-services,
    so this commit retrieves host list from os-services API.

    Change-Id: I5ec007ab1f244ca8caee1eb7b5d4262ac6c32171
    Closes-Bug: #1745502

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 13.0.0.0rc1 release candidate.