Backup and restore feature for Fuel Master

Added backup feature:
* Backs up puppet manifests, repositories, and docker containers
* Stores in /var/backup/fuel
* Uses lrzip to compress archive

Added restore feature:
* Restores all files from backup, overriding any existing files

blueprint backup-master-node

Change-Id: If8d3ab39bf80a60b16728c4afce3ef247227c322