Merge pull request #70 from bio-routing/feature/refactoring_bgp_path

protocols/bgp/packet/BUILD.bazel

protocols/bgp/packet/as_path.go

protocols/bgp/packet/bgp.go

protocols/bgp/packet/large_community.go

protocols/bgp/packet/path_attributes.go

protocols/bgp/packet/path_attributes_test.go

protocols/bgp/server/fsm_established.go

protocols/bgp/server/update_helper.go

route/BUILD.bazel

route/bgp_path.go

route/bgp_path_manager.go

route/bgp_path_test.go

route/bgp_test.go

routingtable/BUILD.bazel

routingtable/adjRIBIn/BUILD.bazel

routingtable/adjRIBIn/adj_rib_in.go

routingtable/adjRIBOut/adj_rib_out.go

routingtable/adjRIBOut/path_id_manager.go

routingtable/filter/actions/add_community_action.go

routingtable/filter/actions/add_community_action_test.go