Fix network/nodes tests

interfaces/message/receiveMessage.go

interfaces/params/CMIX.go

interfaces/params/CMIX_test.go

interfaces/params/E2E.go

interfaces/params/E2E_test.go

interfaces/params/historical.go

interfaces/params/keyExchange.go

interfaces/params/message.go

interfaces/params/network.go

interfaces/params/network_test.go

interfaces/params/rounds.go

interfaces/params/unsafe.go

interfaces/params/unsafe_test.go

network/nodes/register.go

network/nodes/registrar.go