core_ext: add testing? helper
base: use hetzner DNS if we are inside hetzners network
zookeeper: use IP instead of FQDN to speed up connections
postfix: use IP instead of FQDN to speed up connections
ivagrant: use consistent private network everywhere
remove debug output
upgrade to Chef Server 11
update ruby version & bundle
remove old chef role
chef: readd nagios checks
remove beanstalk cookbook