List block storage volumes

    CLI Example:

    .. code-block:: bash

        salt minionname cloud.volume_list my-nova

def volume_list(provider):
    '''
    List block storage volumes

    CLI Example:

    .. code-block:: bash

        salt minionname cloud.volume_list my-nova

    '''
    client = _get_client()
    info = client.extra_action(action='volume_list', provider=provider, names='name')
    return info['name']