Use osfamilly instead of operatingsystem fact + apply puppet-lint recommendation

This commit apply two main changes :

  * osfamily instead of operatingsystem fact : As of now params.pp was relying on
    operatingsystem fact, restricting it to the one mentionned and closing its door
    to distribution such as Ubuntu, Scientific Linux, etc... By using osfamily new
    fork of specified linux distribution will be automatically handled

  * fix puppet-lint recommendation : Recommendation based on extra spacing, tabs,
    wrong quoting const string had been fixed