Correct nodename

This PR correct the following error:

```
NoMethodError
-------------
Undefined method or attribute `codename' on `node'


Cookbook Trace:
---------------
  /tmp/vagrant-chef-1/chef-solo-1/cookbooks/php-fpm/recipes/default.rb:47:in `from_file'
  /tmp/vagrant-chef-1/chef-solo-1/cookbooks/bbc_apps/recipes/comuto3.rb:11:in `from_file'
  /tmp/vagrant-chef-1/chef-solo-1/cookbooks/bbc_apps/recipes/default.rb:39:in `from_file'
```

**Occured with the following environment :**
Vagrant 1.4.3
Chef 11.8.2
Box_url: http://downloads.shadoware.org/wheezy64.box