Storage pool lifecycle events handler

def _pool_event_lifecycle_cb(conn, pool, event, detail, opaque):
    '''
    Storage pool lifecycle events handler
    '''
    _salt_send_event(opaque, conn, {
        'pool': {
            'name': pool.name(),
            'uuid': pool.UUIDString()
        },
        'event': _get_libvirt_enum_string('VIR_STORAGE_POOL_EVENT_', event),
        'detail': 'unknown'  # currently unused
    })