nova-cloud-controller should require the relation to placement

[Corey Bryant]

nova-cloud-controller needs placement in order to schedule nova instances so it really should have a required relation on placement which would allow it to block with a status message if placement isn't related (for train and above).

[Corey Bryant (corey.bryant)]

https://review.opendev.org/#/c/691439/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/691439
Committed: https://git.openstack.org/cgit/openstack/charm-nova-cloud-controller/commit/?id=45988df1ed446945f0c86dac5ea47095626a314c
Submitter: Zuul
Branch: master

commit 45988df1ed446945f0c86dac5ea47095626a314c
Author: Corey Bryant <email address hidden>
Date: Fri Oct 25 18:28:55 2019 +0000

    Make placement a required interface as of train

    Make placement a required interface for train and above as
    placement is required in order to schedule instances.

    Change-Id: If2472ec24df4c3d90b14189f8c4d3cceee5edc97
    Closes-Bug: #1849893

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/19.10
Review: https://review.opendev.org/691711

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/691711
Committed: https://git.openstack.org/cgit/openstack/charm-nova-cloud-controller/commit/?id=9daca64252c6f51dda1b9e8fb368a6aa6289cf0d
Submitter: Zuul
Branch: stable/19.10

commit 9daca64252c6f51dda1b9e8fb368a6aa6289cf0d
Author: Corey Bryant <email address hidden>
Date: Fri Oct 25 18:28:55 2019 +0000

    Make placement a required interface as of train

    Make placement a required interface for train and above as
    placement is required in order to schedule instances.

    Change-Id: If2472ec24df4c3d90b14189f8c4d3cceee5edc97
    Closes-Bug: #1849893
    (cherry picked from commit 45988df1ed446945f0c86dac5ea47095626a314c)