Fix up new Django 3.0 deprecations

Mostly text based: force/smart_text, ugettext_*

awx/main/validators.py

@@ -6,7 +6,7 @@ import base64
 import re
 
 # Django
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.core.exceptions import ValidationError
 
 # REST framework