[Bro-Dev] [JIRA] (BIT-1435) &read_expire does not work for embedded table

[Robin Sommer]

> type embedded_table: table[string] of string &read_expire=1sec;
> global level2_table: table[string] of embedded_table;
> global level1_table: table[string] of string &read_expire=1sec;

If I remember right, there's a problem with the expire attribute not
transferring over in such cases. See if something like this works:

event bro_init()
        {
        local t: table[string] of string &read_expire=1sec;
        level2_table["t1"] = t;
        [...]
        }