Dequeue a zonefile's information to replicate
    Return None if there are none queued

def atlas_zonefile_push_dequeue( zonefile_queue=None ):
    """
    Dequeue a zonefile's information to replicate
    Return None if there are none queued
    """
    ret = None
    with AtlasZonefileQueueLocked(zonefile_queue) as zfq:
        if len(zfq) > 0:
            ret = zfq.pop(0)

    return ret