oslo.policy can not handle policy file removal. As a result, if policy
overrides were defined at some point, but then removed, causes service
outage.
While we could add a handler trigger to restart the service
on policy removal, it's better to simplify the logic and always place an
empty policy.yaml even if no overrides are defined.
Change-Id: I03391b811fca85b108cdaa97c791bff5c736ba23
Signed-off-by: Dmitriy Rabotyagov <dmitriy.rabotyagov@cleura.com>
79f76c5025