StoryBoard Deferred Processors

This patch adds a puppet module that will start up N worker threads
to handle messages sent to the deferred processing queue. It does so
by making use of the new storyboard-worker-daemon command
created in the below patch. Both upstart and sysvinit scripts are
provided, with sysvinit being the default.

https://review.openstack.org/#/c/122890/

Change-Id: I5565cbf8062457d343d3e02dbfaae2852a359d91
Story: 96
Merge "StoryBoard Deferred Processors"