update for traefik v2, treafik-proxy v1

- tls config is no longer allowed in static config file, add separate dynamic config
- no longer need to persist auth config ourselves (TraefikProxy handles this)
- make sure to reload proxy before reloading hub in tests

integration-tests/conftest.py

@@ -25,5 +25,5 @@ def preserve_config(request):
                 f.write(save_config)
         elif os.path.exists(CONFIG_FILE):
             os.remove(CONFIG_FILE)
-        reload_component("hub")
         reload_component("proxy")
+        reload_component("hub")