Fix reference to md5 helper in test

Fixes reference to md5 helper and removes reference to js client
as the md5 function is now provided by utils.

Author: sehrope

test/integration/connection/test-helper.js

@@ -2,6 +2,7 @@
 var net = require('net')
 var helper = require(__dirname + '/../test-helper')
 var Connection = require(__dirname + '/../../../lib/connection')
+var utils = require(__dirname + '/../../../lib/utils')
 var connect = function (callback) {
   var username = helper.args.user
   var database = helper.args.database
@@ -20,10 +21,8 @@ var connect = function (callback) {
       con.password(helper.args.password)
     })
     con.once('authenticationMD5Password', function (msg) {
-      // need js client even if native client is included
-      var client = require(__dirname + '/../../../lib/client')
-      var inner = client.md5(helper.args.password + helper.args.user)
-      var outer = client.md5(inner + msg.salt.toString('binary'))
+      var inner = utils.md5(helper.args.password + helper.args.user)
+      var outer = utils.md5(Buffer.concat([Buffer.from(inner), msg.salt]))
       con.password('md5' + outer)
     })
     con.once('readyForQuery', function () {