update tests for zero-ed values
update tests for zero-ed values

ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-tx,ethereumjs/ethereumjs-vm,ethereum/ethereumjs-tx,michbil/ethereumjs-tx,ruchevits/ethereumjs-tx,vaporry/ethereumjs-tx,ethereumjs/ethereumjs-tx,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereum/ethereumjs-vm