[k8s] Get logs of controller-manager and scheduler
[k8s] Get logs of controller-manager and scheduler

Get the pod logs for controller-manager and scheduler.

The current copy logs from journalctl because controller-manager
and scheduler used to be managed by systemd.

Change-Id: I1e4e5a810f838cc59d4a4aaa4fc4478541872b0b

openstack/magnum,ArchiFleKs/magnum,ArchiFleKs/magnum,openstack/magnum