
When a placement service endpoint is changed, nova-compute does not refresh its cache and continue send requests to the old one: https://bugs.launchpad.net/charm-nova-compute/+bug/1826382 Also, in Train release, nova services expect placement user be present in keystone in advance. Without the dependency, the pod starts crash looping. Change-Id: I6b1a70ec859805794bac2689b04f7eca47ad61b3