Update cadvisor to 0.4.0

I updated cadvisor in Fedora to 0.4.0 and then tried to build kube against the new cadvisor.  It didn't work since cadvisor removes all memory and CPU percentiles code and other container info bits completely upstream.  This pull request adds no new feature.  It merely updates cadvisor to the latest upstream release and removes the kube functions which 'used' that code.  (Almost all of this was just _test.go stuff)