Generated assertions should have technical react IDs

[rprimet]

Input data embeds react-related UUIDs but assertions do not ; most likely an oversight

[denismerigoux]

@rprimet has this been fixed?

[rprimet]

@denismerigoux no -- it was rarely a problem in practice because reordering array items in assertions usually doesn't happen, but I need to get around implementing that. Thanks for the reminder!