Openshift: Specify cgroupfs as the driver kubelet will use
Openshift: Specify cgroupfs as the driver kubelet will use

Seems that by default openshift configures kubelet to use systemd
as default cgroup-driver, but CC currently only supports cgroupfs.
This change specifies kubelet to use cgroupfs.

Fixes #568.

Signed-off-by: Salvador Fuentes <1643e95c8f87731315a493a18f5448396bacc6be@intel.com>

chavafg/tests,clearcontainers/tests,MarioCarrilloA/tests,chavafg/tests,devimc/tests,devimc/tests,clearcontainers/tests,MarioCarrilloA/tests