Non set table_id default to 0 or all tables for deletion?

[viniarck]

Related to kytos-ng/mef_eline#497 (comment)

Quoting the OF1.3 spec:

The table_id chooses the table to which the configuration change should be applied. If the table_id is OFPTT_ALL, the configuration is applied to all tables in the switch.

On pyof a FlowMod table_id defaults to 0, which for installing flows makes a lot of sense. For deletion it makes sense too, but the code we use to perform a non stric deletino is considering a non set table_id same as OFPTT_ALL so it'll delete form the DB, but it'll set on wire the flowmod only deleting from table 0, and then consistency check will eventually delete. So, it's not a great behavior.

Considering other default values, I think it makes sense for deletion to assume table 0 only to also simplify logic in the code, and if users want all tables, they need to set table_id: OFPTT_ALL. I think this would result in the least surprising behavior. This discussion will continue when this gets prioritized eventually

Thanks for confirming @Alopalao kytos-ng/mef_eline#497 (comment)