Fedora cgroups support.

* modules/jenkins/manifests/cgroups.pp
* modules/jenkins/manifests/params.pp: Fedora separates the cgroups
management utilities into an additional package.

* modules/jenkins/templates/cgconfig.erb: Fedora already automounts
cgroups subsystems. Also, because of Red Hat bug 918951, swap
management doesn't work in Fedora 18.

Change-Id: I2366261d64c11fdc8e65a39481e8db9d589ca2de
Reviewed-on: https://review.openstack.org/34083
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins