"Hostname updated" is reported on every deploy

--- git/bitmask ‹master› » leap deploy octopus                                                                                                   1 ↵
 = checking node
   - [octopus] ok
 = synching configuration files
   - hiera/octopus.yaml -> octopus:/etc/leap/hiera.yaml
 = synching puppet manifests
   - /home/varac/dev/projects/leap/git/leap_platform/[bin,tests,puppet] -> octopus:/srv/leap
 = applying puppet
   - [octopus] notice: /File[/var/lib/puppet/modules/postfix]/ensure: removed
   - [octopus] Hostname updated.
   - [octopus] notice: Scope(Class[main]): Services for octopus.unstable.bitmask.net: mx
   - [octopus] notice: /Stage[main]/Postfix/Module_dir[postfix]/File[/var/lib/puppet/modules/postfix]/ensure: created
   - [octopus] notice: Finished catalog run in 34.63 seconds
   - [octopus] Puppet apply complete (changes made).

(from redmine: created on 2014-03-19, closed on 2014-12-10, relates #3585 (closed))