Replace deprecated ugettext_lazy

The ugettext_lazy method has been deprecated since Django 3.0[1].

This was already replaced in Horizon repo by [2].

[1] https://docs.djangoproject.com/en/3.0/releases/3.0/#id3
[2] cd7c1b5110fe1f64cd9dfbeb1072b37912d0efee

Change-Id: I8103c436aeb5253bf191d8879485a988c071a010

designatedashboard/dashboards/project/ngdns/reverse_dns/panel.py

@@ -11,7 +11,7 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 import horizon
 from openstack_dashboard.dashboards.project import dashboard

designatedashboard/dashboards/project/ngdns/reverse_dns/urls.py

@@ -13,7 +13,7 @@
 # under the License.
 
 from django.urls import re_path
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from horizon.browsers import views
 
 title = _("Reverse DNS")

designatedashboard/dashboards/project/ngdns/zones/panel.py

@@ -11,7 +11,7 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 import horizon
 from openstack_dashboard.dashboards.project import dashboard

designatedashboard/dashboards/project/ngdns/zones/urls.py

@@ -13,7 +13,7 @@
 # under the License.
 
 from django.urls import re_path
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from horizon.browsers import views
 
 title = _("Zones")