fix for failed to get system container stats errors

[husky-parul]

Signed-off-by: Parul parsingh@redhat.com

Which issue(s) this PR addresses:

Closes #475
This PR adds "/system.slice/crio.service" to kubelet flags to suppress error message regarding

"Failed to get system container stats" err="failed to get cgroup stats for \"/system.slice/crio.service\": failed to get container info for \"/system.slice/crio.service\": unknown container \"/system.slice/crio.service\"" containerName="/system.slice/crio.service"

[openshift-ci]

@husky-parul: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-openshift-conformance-sig-auth	60c1079	link	false	/test e2e-openshift-conformance-sig-auth
ci/prow/e2e-openshift-conformance-sig-arch	60c1079	link	false	/test e2e-openshift-conformance-sig-arch
ci/prow/e2e-rpm-install	60c1079	link	false	/test e2e-rpm-install
ci/prow/e2e-openshift-conformance-sig-instrumentation	60c1079	link	false	/test e2e-openshift-conformance-sig-instrumentation
ci/prow/e2e-openshift-conformance-sig-storage	60c1079	link	false	/test e2e-openshift-conformance-sig-storage
ci/prow/e2e-openshift-conformance-sig-api-machinery	60c1079	link	false	/test e2e-openshift-conformance-sig-api-machinery
ci/prow/e2e-reboot	60c1079	link	false	/test e2e-reboot
ci/prow/e2e-openshift-conformance-sig-cli	60c1079	link	false	/test e2e-openshift-conformance-sig-cli
ci/prow/e2e-openshift-conformance-sig-apps	60c1079	link	false	/test e2e-openshift-conformance-sig-apps
ci/prow/e2e-openshift-conformance-sig-node	60c1079	link	false	/test e2e-openshift-conformance-sig-node
ci/prow/e2e-openshift-conformance-sig-scheduling	60c1079	link	false	/test e2e-openshift-conformance-sig-scheduling
ci/prow/e2e-openshift-conformance-sig-network	60c1079	link	false	/test e2e-openshift-conformance-sig-network

Full PR test history. Your PR dashboard.

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[fzdarsky]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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