Merge pull request #180 from rohkat-aws/master

Fix the hook execution windows tests

Author: rohkat-aws

lib/instance_agent/plugins/codedeploy/hook_executor.rb

@@ -4,7 +4,7 @@
 require 'fileutils'
 
 require 'instance_agent/plugins/codedeploy/application_specification/application_specification'
-
+require 'instance_agent/platform/thread_joiner'
 module InstanceAgent
   module Plugins
     module CodeDeployPlugin