CHEF-4413 Search for files on both the fqdn and the hostname

Add an additional search path 'host-nodename' and fix the error message to show the real locations searched.

See https://tickets.opscode.com/browse/CHEF-4413

Cheers,

Hugo
Why "sample.node" as the host name? Something without a dot seems it would be more clear, e.g. sample_node.