All callers of qio_net_listener_set_name() already add some sort of
"listen" or "listener" suffix.

For intance, we currently have "migration-socket-listener-listen" and
"vnc-listen-listen" as ioc names.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>