add tests

hack/testdata/initializer-clusterrolebinding.yaml

+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: super-admin
+  initializers:
+    pending:
+    - name: podimage.initializer.com
+  labels:
+    clusterrolebinding: super
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: admin
+subjects:
+- apiGroup: rbac.authorization.k8s.io
+  kind: User
+  name: super-admin

hack/testdata/initializer-deployments.yaml

+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: web
+  initializers:
+    pending:
+    - name: podimage.initializer.com
+  labels:
+    run: web
+spec:
+  replicas: 5
+  selector:
+    matchLabels:
+      run: web
+  template:
+    metadata:
+      labels:
+        run: web
+    spec:
+      containers:
+      - image: nginx:1.10
+        name: web
+        ports:
+        - containerPort: 80
+          protocol: TCP

hack/testdata/initializer-redis-master-service.yaml

+apiVersion: v1
+kind: Service
+metadata:
+  name: redis-master
+  labels:
+    app: redis
+    role: master
+    tier: backend
+  initializers:
+    pending:
+    - name: podimage.initializer.com
+spec:
+  ports:
+  - port: 6379
+    targetPort: 6379
+  selector:
+    app: redis
+    role: master
+    tier: backend