gephi_topo: Use RecocoServerWorker
gephi_topo: Use RecocoServerWorker

This class predates the inclusion of RecocoServerWorker into
ioworker.workers and had basically an exact duplicate which this commit
removes.

MurphyMc/pox,noxrepo/pox,pthien92/sdn,MurphyMc/pox,pthien92/sdn,noxrepo/pox,pthien92/sdn,MurphyMc/pox,pthien92/sdn,noxrepo/pox,MurphyMc/pox,pthien92/sdn,noxrepo/pox,MurphyMc/pox