Update firmware for a single host

def _firmware_update(firmwarefile='', host='',
                     directory=''):
    '''
    Update firmware for a single host
    '''
    dest = os.path.join(directory, firmwarefile[7:])

    __salt__['cp.get_file'](firmwarefile, dest)

    username = __pillar__['proxy']['admin_user']
    password = __pillar__['proxy']['admin_password']
    __salt__['dracr.update_firmware'](dest,
                                      host=host,
                                      admin_username=username,
                                      admin_password=password)