'Handle initialization if this is a standalone service.
A hook point for services to execute tasks before the services are made
available (i.e. showing up on RPC and starting to accept RPC calls) to
other components.  Child classes should override this method.
:param service_id: ID of the service where the manager is running.
:param added_to_cluster: True when a host\'s cluster configuration has
changed from not being defined or being \'\' to
any other value and the DB service record
reflects this new value.'

def init_host(self, service_id=None, added_to_cluster=None):

    pass
