xmlrpc tuning options

- add hiera lookups to params.pp
- use opennebula defaults as hiera defaults
- validate variables to ensure correct hiera data
- add test
xmlrpc tuning options

- add hiera lookups to params.pp
- use opennebula defaults as hiera defaults
- validate variables to ensure correct hiera data
- add test

- correct way how ruby 1.8 parses arrays.
- each_keys function might deliver array in other order
- in template: ensure array os in proper order
Merge pull request #82 from tuxmea/xmlrpctuning

xmlrpc tuning options