Add missing test file

An example test script, that Jenkins will trigger, as a pipeline test
action.

Author: biagic

dist/aws-codepipeline-jenkins-aws-codedeploy_linux.zip

@@ -0,0 +1,15 @@
+#!/usr/bin/env ruby
+
+require 'net/http'
+require 'minitest/autorun'
+require 'socket'
+
+class JenkinsSampleTest < MiniTest::Unit::TestCase
+  def setup
+    @webpage = Net::HTTP.get(URI("http://#{ENV['TEST_IP_ADDRESS']}:8000/index.html"))
+  end
+
+  def test_congratulations
+    assert(@webpage =~ /Congratulations!/)
+  end
+end