fix: Use configmap function

Signed-off-by: Ce Gao <gaoce@caicloud.io>

pkg/util/v1alpha3/katibclient/katib_client.go

@@ -135,6 +135,7 @@ func (k *KatibClient) GetExperiment(name string, namespace ...string) (*experime
 	return exp, nil
 }
 
+// GetConfigMap returns the configmap for the given name and namespace.
 func (k *KatibClient) GetConfigMap(name string, namespace ...string) (map[string]string, error) {
 	ns := getNamespace(namespace...)
 	configMap := &apiv1.ConfigMap{}
@@ -144,19 +145,17 @@ func (k *KatibClient) GetConfigMap(name string, namespace ...string) (map[string
 	return configMap.Data, nil
 }
 
+// GetTrialTemplates returns the trial template if it exists.
 func (k *KatibClient) GetTrialTemplates(namespace ...string) (map[string]string, error) {
-
 	ns := getNamespace(namespace...)
-	trialTemplates := &apiv1.ConfigMap{}
 
-	err := k.client.Get(context.TODO(), types.NamespacedName{Name: experimentsv1alpha3.DefaultTrialConfigMapName, Namespace: ns}, trialTemplates)
+	data, err := k.GetConfigMap(experimentsv1alpha3.DefaultTrialConfigMapName, ns)
 	if err != nil && errors.IsNotFound(err) {
 		return map[string]string{}, nil
 	} else if err != nil {
 		return nil, err
 	}
-	return trialTemplates.Data, nil
-
+	return data, nil
 }
 
 func (k *KatibClient) UpdateTrialTemplates(newTrialTemplates map[string]string, namespace ...string) error {