Add a sample hook to files/hooksscripts.

* As git don't track empty directories 'hookscripts' isn't in the checkout and Puppet fails with
  "Could not retrieve information from environment production source(s) puppet:///modules/one/hookscripts"
Merge pull request #4 from mattthias/fix_missing_hookscripts

Add a sample hook to files/hooksscripts.
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Merge branch 'master' of https://github.com/jehrhardt/opennebula-puppet-module