Add a New func to datastructures

go.mod

go.sum

network/dataStructures/roundData.go

network/dataStructures/roundData_test.go

network/dataStructures/roundUpdates.go

network/dataStructures/roundUpdates_test.go

network/instance.go

network/instance_test.go

network/securedNdf.go

network/securedNdf_test.go