Module update + fixes

new:
- added Eclipse project file (automatic management of metadata.json)
- added metadata.json 
- added Rakefile
- added spec/spec.opts

fixes:
- merged with deesto (cvmfs/puppet-cvmfs/#1) and updated metadata.json
- moved cvmfs_hash to params (now all params can be set in foreman without hiera)
- fixed dependency (ripienaar/concat) version
- changed operatingsystemmajorrelease to facter default (operatingsystemmajrelease)