Vagrant Post-Processor Refactor + "Include" feature

unlock

builder/digitalocean: Updated DigitalOcean default image id

provisioner/chef-solo: Chef environment doesn't work for chef-solo

provisioner/puppet: fix crash when HieraConfigPath or ManifestDir is specified in the config file.

Prevents the following error,
Build 'amazon-instance' errored: template: tpl11:1:103: executing "tpl11" at <.HieraConfigPath>: HieraConfigPath has arguments but cannot be invoked as function

It looks like DigitalOcean replaced the "Ubuntu 12.04" image with "Ubuntu 12.04.3".  We've updated the ImageID to point to the new image.