Add deploy swap migration

- Deploy ERC20MinterPauser
- Deploy SimpleSwapFactory
- Deploy SimpleSwap

Note that this is only for one user.

migrations/2_deploy_swap.js

@@ -0,0 +1,22 @@
+var {BN, balance, constants, expectEvent} = require("@openzeppelin/test-helpers");
+var ERC20PresetMinterPauser = artifacts.require("ERC20PresetMinterPauser");
+var SimpleSwapFactory = artifacts.require('./SimpleSwapFactory.sol')
+var ERC20SimpleSwap = artifacts.require('./ERC20SimpleSwap.sol')
+
+module.exports = async function(deployer, network, accounts) {
+    var DEFAULT_HARDDEPOSIT_DECREASE_TIMEOUT = new BN(86400)
+
+    // Deploy ERC20 token
+    await deployer.deploy(ERC20PresetMinterPauser, "TestToken", "TEST", {from: accounts[0]})
+    var erc20 = await ERC20PresetMinterPauser.deployed()
+
+    // Deploy SwapFactory
+    await deployer.deploy(SimpleSwapFactory, ERC20PresetMinterPauser.address)
+    var simpleSwapFactory = await SimpleSwapFactory.deployed()
+
+    // Deploy Swap
+    let { logs } = await simpleSwapFactory.deploySimpleSwap(accounts[0], DEFAULT_HARDDEPOSIT_DECREASE_TIMEOUT)
+    var ERC20SimpleSwapAddress = logs[0].args.contractAddress
+
+    console.log("ERC20SimpleSwapAddress ", ERC20SimpleSwapAddress)
+}