add vm1 to the list of hosts
actually use the ssh control session
Merge pull request #22 from djmitche/add-vm1

Add vm1
add nine.buildbot.net to buildbot.net zone

* also remove nine.buildbot.buildbot.net
* remove TXT record for nine.buildbot.net
Merge pull request #23 from sa2ajj/add-nine-to-dns

add nine.buildbot.net to buildbot.net zone
do not highlight group_by step
add a list of host fingerprints
remove empty file
split base role into two

base

* create service account only
* install sudo
* configure passwordless sudo for wheel group users
* install mandatory and utility packages

base-servicehost (depends on base)

* create admin accounts
Merge pull request #26 from sa2ajj/base-roles

Split base role into two
Merge sa2ajj/buildbot-infra:add-fingerprints (PR #24)