Node ReST service cannot update geolocation information

The way Hibernate deals with @Embedded entities is that if none of the columns have data, the embedded object is null, rather than empty.

The NodeRestService (and AssetRecordResource) do not assign the AssetRecord an OnmsGeolocation object before attempting to use a BeanWrapper to set properties on it, so it is impossible to add, say, longitude/latitude to a node's asset records.