Set a keys time to live in seconds

    CLI Example:

    .. code-block:: bash

        salt '*' redis.expire foo 300

def expire(key, seconds, host=None, port=None, db=None, password=None):
    '''
    Set a keys time to live in seconds

    CLI Example:

    .. code-block:: bash

        salt '*' redis.expire foo 300
    '''
    server = _connect(host, port, db, password)
    return server.expire(key, seconds)