INTERNAL_ERROR in MakeDir on server causes client to mark folder as conflict

When the client is asking the server to execute MakeDir and the server fails for some reason the operation is not retried but the handler for filedir_error_in_creation which simply marks the folder as conflict.

def filedir_error_in_creation(self, event, params, failure, marker):
        """Move actual content to conflict, and delete the metadata."""
        self.m.action_q.uuid_map.err(marker, failure)
        self.key.move_to_conflict()
        self.key.delete_metadata()