Description of problem:
kubefedconfig.spec.featureGates is null when installing kubefed control plane with kubefed-operator


Version-Release number of selected component (if applicable):
$ oc get clusterversion
NAME      VERSION                             AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.2.0-0.nightly-2019-06-19-210910   True        False         3h52m   Cluster version is 4.2.0-0.nightly-2019-06-19-210910

kubefed-operator: branch release-4.2(10f2d7f25bbbb9d81406931576da3c2bb4fe2e98)

How reproducible:
100%

Steps to Reproduce:
1.Install operator with cmd: ./scripts/install-kubefed.sh -n federation-test -d cluster
2. Check kubefedconfig object
3.

Actual results:
$ oc get kubefedconfig kubefed -n federation-test -ojson|jq .spec.featureGates
[]

Expected results:
https://github.com/kubernetes-sigs/kubefed/blob/master/config/kubefedconfig.yaml

Additional info:
$ oc get kubefed kubefed-resource -n federation-test -ojson
{
    "apiVersion": "operator.kubefed.io/v1alpha1",
    "kind": "KubeFed",
    "metadata": {
        "annotations": {
            "kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"operator.kubefed.io/v1alpha1\",\"kind\":\"KubeFed\",\"metadata\":{\"annotations\":{},\"name\":\"kubefed-resource\",\"namespace\":\"federation-test\"},\"spec\":{\"scope\":\"Namespaced\"}}\n"
        },
        "creationTimestamp": "2019-06-21T08:17:33Z",
        "generation": 1,
        "name": "kubefed-resource",
        "namespace": "federation-test",
        "resourceVersion": "72526",
        "selfLink": "/apis/operator.kubefed.io/v1alpha1/namespaces/federation-test/kubefeds/kubefed-resource",
        "uid": "053d0b09-93fd-11e9-b336-069d557c2d62"
    },
    "spec": {
        "scope": "Namespaced"
    },
    "status": {
        "version": "0.1.0"
    }
}