openapi: Use "group" to look for resources

pkg/kubectl/cmd/util/openapi/validation/validation_test.go

@@ -41,6 +41,28 @@ var _ = Describe("resource validation using OpenAPI Schema", func() {
 		Expect(validator).ToNot(BeNil())
 	})
 
+	It("finds Deployment in Schema and validates it", func() {
+		err := validator.ValidateBytes([]byte(`
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  labels:
+    name: redis-master
+  name: name
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: redis
+    spec:
+      containers:
+      - image: redis
+        name: redis
+`))
+		Expect(err).To(BeNil())
+	})
+
 	It("validates a valid pod", func() {
 		err := validator.ValidateBytes([]byte(`
 apiVersion: v1