Return load

    CLI Example:

    .. code-block:: bash

        salt '*' apcups.status_load

def status_load():
    '''
    Return load

    CLI Example:

    .. code-block:: bash

        salt '*' apcups.status_load
    '''
    data = status()
    if 'LOADPCT' in data:
        load = data['LOADPCT'].split()
        if load[1].lower() == 'percent':
            return float(load[0])

    return {'Error': 'Load not available.'}