Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/deprecate-service-management-in-nova-manage.

Description:

The service command of nova-manage tool provides duplicated functionality
with the nova REST API.

The novaclient already has the following service commands:

service-disable   Disable the service.
service-enable    Enable the service.
service-list      Show a list of all running services.
host-describe     Describe a specific host

This covers what nova-manage service was providing so let's
deprecate the legacy nova-manage subcommand and mark it for
removal in the N release.

Specification URL (additional information):

None