1_inital_migration of truffle unbox result into erroneous result

[nullenboom]

Before commit nullenboom/parity-example-truffle-box@1f6f1d5 the first test of the project would be erroneous and list a contract which wasnt deployed in this test case, fix is to use another line of migration code

Problem: New truffle boxes uses the erroneous syntax

truffle unbox

erroneous result in first test: const Migrations = artifacts.require("Migrations");

fixed: var Migrations = artifacts.require("./Migrations.sol");