self reference for reconfigure
changing to btrfs as filesystem storage
add comments for setting up btrfs
using external devices with btrfs
updating from tested sequence
add python3-empy to repo
add docker to repo
switch to use docker module instead of custom code
Switch to use docker puppet module.

Add support for squid transparent proxy if run_squid is set in common.yaml.
fixing iptables rules to not break docker
fixing default iptables
enabling squid by default
adding required mangle section
Merge branch 'ec2test_btrfs' into btrfs_merge_out
remove all references to btrfs
Merge branch 'ec2test' of github.com:ros-infrastructure/buildfarm_deployment into ec2test