Description of problem:
init-containers with resource requests/limits got error
Message
Failed to start container with id 4b43d72e4376312cad410647323cb9513cf3440972e96c0ff58ca5886be9ff1a with error: rpc error: code = 2 desc = failed to start container "4b43d72e4376312cad410647323cb9513cf3440972e96c0ff58ca5886be9ff1a": Error response from daemon: {"message":"invalid header field value \"oci runtime error: container_linux.go:247: starting container process caused \\\"process_linux.go:291: setting cgroup config for ready process caused \\\\\\\"failed to write 50000 to cpu.cfs_quota_us: write /sys/fs/cgroup/cpu,cpuacct/kubepods.slice/kubepods-burstable.slice/kubepods-burstable-pod0eb5bca1_4c2b_11e7_9837_42010af00003.slice/docker-4b43d72e4376312cad410647323cb9513cf3440972e96c0ff58ca5886be9ff1a.scope/cpu.cfs_quota_us: invalid argument\\\\\\\"\\\"\\n\""}


Version-Release number of selected component (if applicable):
openshift v3.6.99
kubernetes v1.6.1+5115d708d7
etcd 3.1.0

How reproducible:
Always

Steps to Reproduce:
1. create a pod of init-containers with resource requests/limits
$ oc create -f init-containers.yaml
$ cat init-containers.yaml
apiVersion: v1
kind: Pod
metadata:
  name: init-limits
spec:
  containers:
  - image: docker.io/ocpqe/hello-pod
    name: hello-pod
    resources: 
      limits: 
        cpu: "150m"
        memory: "120Mi"
      requests: 
        cpu: "100m"
        memory: "100Mi"
  initContainers:
  - name: init
    image: centos:centos7
    command:
    - /bin/true
    resources:
      limits:
        cpu: "500m"
        memory: "400Mi"
      requests:
        cpu: "300m"
        memory: "200Mi"
2. exam pod status
$ oc get pod

Actual results:
Errors
$ oc get pod
NAME            READY     STATUS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      RESTARTS   AGE
init-quota123   0/1       Init:rpc error: code = 2 desc = failed to start container "4b43d72e4376312cad410647323cb9513cf3440972e96c0ff58ca5886be9ff1a": Error response from daemon: {"message":"invalid header field value \"oci runtime error: container_linux.go:247: starting container process caused \\\"process_linux.go:291: setting cgroup config for ready process caused \\\\\\\"failed to write 50000 to cpu.cfs_quota_us: write /sys/fs/cgroup/cpu,cpuacct/kubepods.slice/kubepods-burstable.slice/kubepods-burstable-pod0eb5bca1_4c2b_11e7_9837_42010af00003.slice/docker-4b43d72e4376312cad410647323cb9513cf3440972e96c0ff58ca5886be9ff1a.scope/cpu.cfs_quota_us: invalid argument\\\\\\\"\\\"\\n\""}   0          4s
[root@dhcp-140-97 initcontainers]# oc get pod
NAME            READY     STATUS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      RESTARTS   AGE
init-quota123   0/1       Init:rpc error: code = 2 desc = failed to start container "8d2b645c2f694639ad6744af38c3c3416ba2ce05a2973a6554b0456ffad5ec1a": Error response from daemon: {"message":"invalid header field value \"oci runtime error: container_linux.go:247: starting container process caused \\\"process_linux.go:291: setting cgroup config for ready process caused \\\\\\\"failed to write 50000 to cpu.cfs_quota_us: write /sys/fs/cgroup/cpu,cpuacct/kubepods.slice/kubepods-burstable.slice/kubepods-burstable-pod0eb5bca1_4c2b_11e7_9837_42010af00003.slice/docker-8d2b645c2f694639ad6744af38c3c3416ba2ce05a2973a6554b0456ffad5ec1a.scope/cpu.cfs_quota_us: invalid argument\\\\\\\"\\\"\\n\""}   1          6s
[root@dhcp-140-97 initcontainers]# oc get pod
NAME            READY     STATUS                  RESTARTS   AGE
init-quota123   0/1       Init:CrashLoopBackOff   1          7s


Expected results:
pod running, no error

Additional info:
$ oc describe pod
will show error message, too