Use facter's osfamily instead of operatingsystem.
Use facter's osfamily instead of operatingsystem.

The osfamily fact is more flexible when we want to support more
GNU/Linux distributions while avoiding unnecessary code duplication.

Change-Id: Iea4c73c19e7f94df8daccf25c764b6a4539a1ea0
Reviewed-on: https://review.openstack.org/27400
Reviewed-by: Clark Boylan <635fc31d01fa593720982fa0568e87170cedbe2c@gmail.com>
Reviewed-by: James E. Blair <e81a02a9d6405977f63a769d9f6ec8ed9d924325@inaugust.com>
Approved: Jeremy Stanley <98883b97e35b7bb1ac282bb863f2e9d917db0454@yuggoth.org>
Reviewed-by: Jeremy Stanley <98883b97e35b7bb1ac282bb863f2e9d917db0454@yuggoth.org>
Tested-by: Jenkins

open-switch/infra_puppet-ssh,open-switch/infra_puppet-ssh