backend/server/apps/kea/rps.go
    Renamed RpsPuller to RpsWorker, no longer contains a PeriodicPuller
    deleted the following functions:
    Shutdown()
    pullStats()
    getStatsFromApp()

backend/server/apps/kea/rps_test.go
    Reworked tests
    Removed those which primarily only exercized pullStats()/
    getSTatsFromApp()