Replica Set creation fails with empty selector not valid

[fabianvf]

Thinking this might be an issue with overeager snake_casing or something, the request body that is generated has match_labels and match_expressions instead of matchLabels and matchExpressions.
I looked into the argspec for the resource and it had 'property_path': ['spec', 'selector', 'match_labels'] in it, I'm not totally sure if I'm right but I think that is probably where the error is. If I manually tweak the request body to camelCase the selectors everything seems to work fine.

self = <openshift.helper.ansible.KubernetesAnsibleModuleHelper object at 0x7fdad6581c50>, namespace = 'test-e8e00fd1', k8s_obj = None
body = {'kind': 'ReplicaSet', 'metadata': {'name': 'create-2794f0', 'namespace': 'test-e8e00fd1'}, 'spec': {'replicas': 3, 's...'create-2794f0'}}, 'spec': {'containers': [{'image': 'openshift/origin-ruby-sample:v1.0', 'name': 'create-2794f0'}]}}}}

    def create_object(self, namespace=None, k8s_obj=None, body=None):
        """
            Send a POST request to the API. Pass either k8s_obj or body.
            :param namespace: namespace value or None
            :param k8s_obj: optional k8s object model
            :param body: optional JSON dict
            :return: new object returned from the API
            """
        self.logger.debug('Starting create object')
        w, stream = self._create_stream(namespace)
        return_obj = None
        name = None
        if k8s_obj:
            name = k8s_obj.metadata.name
        elif body:
            name = body.get('metadata', {}).get('name', None)
        try:
            create_method = self.lookup_method('create', namespace)
            if namespace:
                if k8s_obj:
                    create_method(namespace, k8s_obj)
                else:
                    create_method(namespace, body=body)
            else:
                if k8s_obj:
                    create_method(k8s_obj)
                else:
                    create_method(body=body)
        except ApiException as exc:
            msg = json.loads(exc.body).get('message', exc.reason) if exc.body.startswith('{') else exc.body
>           raise self.get_exception_class()(msg, status=exc.status)


E           openshift.helper.exceptions.KubernetesException: {"message": "ReplicaSet.extensions \"create-2794f0\" is invalid: spec.selector: Invalid value: {}: empty selector is not valid for deployment.", "status": 422}