Fix up new Django 3.0 deprecations

Mostly text based: force/smart_text, ugettext_*

awx/main/views.py

@@ -7,7 +7,7 @@ import json
 from django.http import HttpResponse, HttpResponseRedirect
 from django.shortcuts import render
 from django.utils.html import format_html
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.views.decorators.csrf import csrf_exempt
 
 # Django REST Framework