Add PermissionDenied exception to retry decorator

We have seen several cases where Pub tasks fail because the worker gets
a permission denied error, immediately after successfully logging in. We
believe that these are false negatives, which can be resolved by a
simple retry.

Author: amcmahon-rh

kobo/xmlrpc.py

@@ -479,7 +479,8 @@ def request(self, *args, **kwargs):
                 except KeyboardInterrupt:
                     raise
                 except (socket.error, socket.herror, socket.gaierror, socket.timeout,
-                        httplib.CannotSendRequest, xmlrpclib.ProtocolError) as ex:
+                        httplib.CannotSendRequest, xmlrpclib.ProtocolError,
+                        xmlrpclib.Fault) as ex:
                     if i >= self.retry_count:
                         raise
                     retries_left = self.retry_count - i