Comment 16 for bug 1551150

Some more information on cgroup-lite and where it may fail.

 - cgroup lite is triggered on "mounted MOUNTPOINT=/sys/fs/cgroup" => the path is shown as mountend above, so not it
 - The job then gets skipped if /bin/cgroups-mount doesn't exist => part of the cgroup-lite package, so not it
 - The job then gets skipped if /sys/fs/cgroup doesn't exist => was shown as mounted above, so not it
 - cgroup-lite exits if a cgroup entry is found in /etc/fstab
 - cgroup-lite exits if /proc/cgroups doesn't exist => all Ubuntu kernels have it, so not it

So the most likely reason I believe would be a "cgroup" entry of some sort in /etc/fstab, the second most likely reason would be a failure for the "mounted MOUNTPOINT=/sys/fs/cgroup" to be emitted by upstart somehow.