Set this peer's zonefile inventory

def atlas_peer_set_zonefile_inventory( peer_hostport, peer_inv, peer_table=None ):
    """
    Set this peer's zonefile inventory
    """
    with AtlasPeerTableLocked(peer_table) as ptbl:
        if peer_hostport not in ptbl.keys():
            return None 

        ptbl[peer_hostport]['zonefile_inv'] = peer_inv

    return peer_inv