Lazy removal of a southbound originated mapping is triggered when a lookup for
that particular mapping is performed. Additionally, on a Map-Register, the time
bucket wheel for mapping removal is ran for all mappings. However, if a mapping
expires and no such event happens, mappings are still kept in the map-cache,
and shown when listed from the Karaf console. It would be much better to run
the time bucket wheel algorithm before listing mappings in the Karaf console.