f56b13b610
Add test `test_hold_invoice_set_doesnt_get_expired` to test_lnpeer to ensure a mpp set on which a hold invoice callback doesn't get expired automatically if the cltv_abs falls below MIN_FINAL_CLTV_DELTA_ACCEPTED as these sets should only get failed if the htlcs are safe to fail by the target of the hold invoice callback (e.g. swap got refunded successfully).