Restore cgroup-bin Upstart jobs on Ubuntu Quantal.

* modules/jenkins/files/cgroups/upstart_cgconfig: Very trivial
Upstart job to load /etc/cgconfig.conf once cgroup-lite has started.

* modules/jenkins/files/cgroups/upstart_cgred: Very trivial Upstart
job to start cgred once cgconfig has been loaded.

* modules/jenkins/manifests/cgroups.pp: Conditionally add Upstart
jobs cgconfig and cgred if Ubuntu >= 12.10. They used to exist, but
were dropped in the process of refactoring cgroup support after
Precise.

* modules/jenkins/manifests/params.pp: Add parameter lists for the
cgconfig and cgred dependencies since they differ between RHEL and
Ubuntu.

* modules/jenkins/templates/cgconfig.erb: Conditionally omit the
default cgroup mounts section on Ubuntu Quantal or later.

Change-Id: I16e2996387d534928a3cfa90de9159fbe02bbdd2
Reviewed-on: https://review.openstack.org/20638
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins