Summary:
Right now this is throwing an error, we instead gracefully
handle this. I'm not quite sure where this is coming from but as we're
not really doing anything with the requests before they're added here,
it must be coming from the network stack.
We can't really build another stable key on the client side because we
also need to match it up with the response. Open for ideas!
Changelog: Network requests with duplicate IDs are filtered out
Reviewed By: mweststrate
Differential Revision: D30337820
fbshipit-source-id: d312833727b383fa5f4d18a506ab581cd2151d13