[ixpmanager] ixf-id mandatory for json export

[Nishal Goburdhan]

hi,

it appears that an ixf-id is now mandatory to generate the json export from ixpmanager.
i can grok why this might be _desirable_;  which, iirc, was the previous/legacy case with ixpmanager.
but, i don’t believe it should be _mandatory_;  especially if the IX has a peeringdb id (ie. that which is actually useful!)

how to get this made optional again (without inserting a random number into the database, or making other code hacks)

-n.

(who has been waiting a week to get an id-that-he-doesn’t-feel-he-really-needs-and-has-never-had-to-apply-for-before allocated)