Fix up new Django 3.0 deprecations

Mostly text based: force/smart_text, ugettext_*

awx/main/models/ha.py

@@ -9,7 +9,7 @@ from django.core.validators import MinValueValidator
 from django.db import models, connection
 from django.db.models.signals import post_save, post_delete
 from django.dispatch import receiver
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.conf import settings
 from django.utils.timezone import now, timedelta