fix the build and load minitest

Author: hone

Gemfile

@@ -11,4 +11,5 @@ group :test do
   gem "hoptoad_notifier"
   gem "airbrake"
   gem "i18n"
+  gem "minitest"
 end

test/test_helper.rb

@@ -4,6 +4,7 @@
 $LOAD_PATH.unshift dir + '/../lib'
 $TESTING = true
 require 'test/unit'
+require 'minitest/unit'
 
 require 'redis/namespace'
 require 'resque'