Added route counts to routing table and added some testing

protocols/bgp/server/fsm_established.go

protocols/bgp/server/fsm_test.go

protocols/bgp/server/update_sender.go

protocols/bgp/server/update_sender_add_path.go

routingtable/adjRIBIn/adj_rib_in.go

routingtable/adjRIBOut/adj_rib_out.go

routingtable/locRIB/loc_rib.go

routingtable/table.go

routingtable/trie.go