Install correct Python YAML package on CentOS/RH.

* modules/jeepyb/manifests/init.pp: Special-case the
Python YAML bindings package name depending on facter osfamily.

Change-Id: Iaa11e601e387428040a5d992219bd67812d8bac8
Reviewed-on: https://review.openstack.org/28652
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins