Description of problem:
Create a imagestream and check the usage num of 'openshift.io/imagestreams' which was double counted.

Version-Release number of selected component (if applicable):
openshift version
openshift v3.6.78
kubernetes v1.6.1+5115d708d7
etcd 3.1.0

How reproducible:
always

Steps to Reproduce:
1.Login OpenShift and create project;
2.Create imagestream quota for the project:
  `oc create -f  https://raw.githubusercontent.com/openshift-qe/v3-testfiles/master/quota/openshift-object-counts.yaml`
3.Check the usage num of imagestream, should be 0;
[root@host-8-174-4 ~]# oc get quota -o yaml 
apiVersion: v1
items:
......
  spec:
    hard:
      openshift.io/imagestreams: "10"
  status:
    hard:
      openshift.io/imagestreams: "10"
    used:
      openshift.io/imagestreams: "0"

4.Create one imagestream, check the usage num of imagestreams.

Actual results:
4.After create one imagestream, the usage num of imagestream was double counted:
[root@host-8-174-4 ~]# oc tag --source=docker aosqe/caddy-docker:latest caddy-docker:latest
Tag caddy-docker:latest set to aosqe/caddy-docker:latest.
[root@host-8-174-4 ~]# oc get is
NAME           DOCKER REPO                               TAGS      UPDATED
caddy-docker   172.30.221.137:5000/testzy/caddy-docker   latest    Less than a second ago
[root@host-8-174-4 ~]# oc get quota -o yaml 
apiVersion: v1
items:
- apiVersion: v1
  kind: ResourceQuota
  metadata:
    creationTimestamp: 2017-05-23T03:04:34Z
    name: openshift-object-counts
    namespace: testzy
    resourceVersion: "31049"
    selfLink: /api/v1/namespaces/testzy/resourcequotas/openshift-object-counts
    uid: 8c53f5dc-3f64-11e7-a4ea-fa163e70a6ab
  spec:
    hard:
      openshift.io/imagestreams: "10"
  status:
    hard:
      openshift.io/imagestreams: "10"
    used:
      openshift.io/imagestreams: "2"
kind: List
metadata: {}
resourceVersion: ""
selfLink: ""


Expected results:
4. Should count the imagestream usage num correctly.

Additional info: