WIP 2/4 tests passing, still need to re-implement ZIP and bare compression files and do some cleanup

packer: HookProvision errors if no communicator

website: adds missing comma

The `parallels_tools_flavor` key-value pair is missing a trailing comma, thereby making it invalid JSON.

Merge branch 'puppet_working_dir' of https://github.com/ColinHebert/packer into ColinHebert-puppet_working_dir

provisioner/shell: remove file after exec [GH-1536]

builder/amazon: Update docs on ssh_private_key