Jenkins slave puppetry for CentOS.
Jenkins slave puppetry for CentOS.

The install scripts now look for CentOS in release files. Also some
instances of facter's operatingsystem are switched to osfamily and
capitalization of RedHat is normalized to match what facter uses.

Change-Id: I3bbca5481d0d5e6de9e62bfd6e2b0a85264ed6ed
Reviewed-on: https://review.openstack.org/27398
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