move oauth2 templates in a fargo/ subdirectory (#22920)

fargo/oauth2/views.py

@@ -58,7 +58,7 @@ class OAUTH2APIViewMixin(APIView):
 
 
 class OAuth2AuthorizeView(FormView):
-    template_name = 'oauth2/authorize.html'
+    template_name = 'fargo/oauth2/authorize.html'
     form_class = OAuth2AuthorizeForm
     success_url = '/'
 
@@ -193,7 +193,7 @@ put_document = PutDocumentAPIView.as_view()
 
 
 class OAuth2AuthorizePutView(TemplateView):
-    template_name = 'oauth2/confirm.html'
+    template_name = 'fargo/oauth2/confirm.html'
 
     def redirect(self, **kwargs):
         '''Return to requester'''