setup correct per distro iface variable

Conflicts:
	.kitchen.yml
bind tests instance to eth0:1, lo:0 throws a segfault on centos

Conflicts:
	.kitchen.yml
cleanup unused data bags for reals now
add a hack lib to force encoding
remove lo interface, causing dhcpd to not start on centos and testing is ok without it

Conflicts:
	.kitchen.yml
fix spec
fix berks for ubuntu