Add a check for anonymous requests

closes #1605

(cherry picked from commit b4c550e)

pulp_container/app/token_verification.py

@@ -74,6 +74,9 @@ def authenticate(self, request):
 
         If basic authentication could not success, remote webserver authentication is considered.
         """
+        if request.headers.get("Authorization") == "Basic Og==":
+            return (AnonymousUser, None)
+
         try:
             user = super().authenticate(request)
         except AuthenticationFailed: