[#4177] Generated a Contract model.

app/models/contract.rb

@@ -0,0 +1,3 @@
+class Contract < ActiveRecord::Base
+  unloadable
+end

test/unit/contract_test.rb

@@ -0,0 +1,4 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+class ContractTest < ActiveSupport::TestCase
+end