Create entry in run request buffer.

        Parameters
        ----------
        model_run : ModelRunHandle
            Handle to model run
        run_url : string
            URL for model run information

def run_model(self, model_run, run_url):
        """Create entry in run request buffer.

        Parameters
        ----------
        model_run : ModelRunHandle
            Handle to model run
        run_url : string
            URL for model run information
        """
        # Create model run request
        request = RequestFactory().get_request(model_run, run_url)
        # Write request and connector information into buffer
        self.collection.insert_one({
            'connector' : self.connector,
            'request' : request.to_dict()
        })