Description of problem:
Now in upstream when docker version < 1.12, when create pod with sysctl, it will tip "SysctlUnsupported Docker before 1.12 does not support sysctls". But in openshift the pod can running well.

Version-Release number of selected component (if applicable):
openshift v3.3.1.1
docker: 1.10.3

How reproducible:
Always

Steps to Reproduce:
1.Create a pod with sysctl
$ oc create -f https://raw.githubusercontent.com/mdshuai/testfile-openshift/master/sysctls/sysctl-safe.yaml

2.Check the pod status
$ oc get pod

Actual results:
2. Pod is running.
[root@ip-172-18-10-30 ~]# oc get pod hello-pod
NAME        READY     STATUS    RESTARTS   AGE
hello-pod   1/1       Running   0          1m

Expected results:
2. Pod status is SysctlUnsupported when docker version < 1.12

Additional info:
2. result on kube env with docker 1.10.3
[root@ip-172-18-6-200 ~]# kubectl create -f https://raw.githubusercontent.com/mdshuai/testfile-openshift/master/sysctls/sysctl-safe.yaml
pod "hello-pod" created
[root@ip-172-18-6-200 ~]# kubectl get pod
NAME        READY     STATUS              RESTARTS   AGE
hello-pod   0/1       SysctlUnsupported   0          4s
[root@ip-172-18-6-200 ~]# kubectl describe pod hello-pod|grep SysctlUnsupported
Reason:		SysctlUnsupported
  2m		2m		1	{kubelet 127.0.0.1}			Warning		SysctlUnsupported	Docker before 1.12 does not support sysctls