Return a connected model's table name (which read and written to by Heroku Connect).

def get_connected_model_for_table_name(table_name):
    """Return a connected model's table name (which read and written to by Heroku Connect)."""
    for connected_model in get_heroku_connect_models():
        if connected_model.get_heroku_connect_table_name() == table_name:
            return connected_model
    raise LookupError('No connected model found for table %r' % (table_name,))