Replace deprecated ugettext_lazy and ungettext_lazy

The ugettext_lazy method and the ungettext_lazy method are both
deprecated since Django 3.0[1].

These were already replaced in Horizon repo by [2].

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

Change-Id: If17fba432f4a00979f70b535bc1f1750d8a15f19

neutron_fwaas_dashboard/dashboards/project/firewalls_v2/forms.py

@@ -16,7 +16,7 @@ import logging
 from operator import attrgetter
 
 from django.urls import reverse
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from horizon import exceptions
 from horizon import forms
 from horizon import messages

neutron_fwaas_dashboard/dashboards/project/firewalls_v2/panel.py

@@ -14,7 +14,7 @@
 
 import logging
 
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 import horizon
 from openstack_dashboard.api import neutron
 

neutron_fwaas_dashboard/dashboards/project/firewalls_v2/tables.py

@@ -16,9 +16,9 @@ import logging
 
 from django.template import defaultfilters as filters
 from django.urls import reverse
+from django.utils.translation import gettext_lazy as _
+from django.utils.translation import ngettext_lazy
 from django.utils.translation import pgettext_lazy
-from django.utils.translation import ugettext_lazy as _
-from django.utils.translation import ungettext_lazy
 
 from horizon import exceptions
 from horizon import tables
@@ -65,7 +65,7 @@ class DeleteRuleLink(policy.PolicyTargetMixin, tables.DeleteAction):
 
     @staticmethod
     def action_present(count):
-        return ungettext_lazy(
+        return ngettext_lazy(
             u"Delete Rule",
             u"Delete Rules",
             count
@@ -73,7 +73,7 @@ class DeleteRuleLink(policy.PolicyTargetMixin, tables.DeleteAction):
 
     @staticmethod
     def action_past(count):
-        return ungettext_lazy(
+        return ngettext_lazy(
             u"Scheduled deletion of Rule",
             u"Scheduled deletion of Rules",
             count
@@ -97,7 +97,7 @@ class DeletePolicyLink(policy.PolicyTargetMixin, tables.DeleteAction):
 
     @staticmethod
     def action_present(count):
-        return ungettext_lazy(
+        return ngettext_lazy(
             u"Delete Policy",
             u"Delete Policies",
             count
@@ -105,7 +105,7 @@ class DeletePolicyLink(policy.PolicyTargetMixin, tables.DeleteAction):
 
     @staticmethod
     def action_past(count):
-        return ungettext_lazy(
+        return ngettext_lazy(
             u"Scheduled deletion of Policy",
             u"Scheduled deletion of Policies",
             count
@@ -125,7 +125,7 @@ class DeleteFirewallGroupLink(policy.PolicyTargetMixin,
 
     @staticmethod
     def action_present(count):
-        return ungettext_lazy(
+        return ngettext_lazy(
             u"Delete Firewall Group",
             u"Delete Firewall Groups",
             count
@@ -133,7 +133,7 @@ class DeleteFirewallGroupLink(policy.PolicyTargetMixin,
 
     @staticmethod
     def action_past(count):
-        return ungettext_lazy(
+        return ngettext_lazy(
             u"Scheduled deletion of Firewall Group",
             u"Scheduled deletion of Firewall Groups",
             count

neutron_fwaas_dashboard/dashboards/project/firewalls_v2/tabs.py

@@ -12,7 +12,7 @@
 #    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 _
 
 from horizon import exceptions
 from horizon import tabs

neutron_fwaas_dashboard/dashboards/project/firewalls_v2/views.py

@@ -14,7 +14,7 @@
 
 from django.urls import reverse
 from django.urls import reverse_lazy
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 from horizon import exceptions
 from horizon import forms

neutron_fwaas_dashboard/dashboards/project/firewalls_v2/widgets.py

@@ -13,7 +13,7 @@
 import itertools
 
 from django.template.loader import get_template
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from horizon.forms import fields
 
 """A custom Horizon Forms Select widget that displays select choices as a table

neutron_fwaas_dashboard/dashboards/project/firewalls_v2/workflows.py

@@ -13,7 +13,7 @@
 #    under the License.
 from operator import attrgetter
 
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from horizon import exceptions
 from horizon import forms
 from horizon.utils import validators