[Bug 1174354] Missing Requires: cadvisor

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1174354

--- Comment #2 from Jay Vyas  ---
in the fedora portion of the docs, it is listed as a companion that is brought
in by kube.

https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/getting-s...

Hence at least we should update the docs.