advertise_objects.repy needs to be re-written and enhanced

[choksi81]

The current advertise_objects.repy that provides a LookupCache object (for caching result when frequent lookup is required) and AdvertisePipe object which advertises the (key,val) at certain intervals.

This file needs to be updated to combine the two objects so we have one object that performs both task. This will allow us to do quick lookups of local advertisements. Furthermore we need to make it conform to advertise.repy, so they accept the same arguments.