If it's an ABP test then Sky must have known that there was a strong chance that Henao was going to trip a wire with the BP process. If that's so, then they dont really deserve brownie points for moving first, unless they had reason to think that his "anomalies" would get a BP pass.
They don't deserve calumny for moving first either, mind you. It's just that if it had been an internal test and Sky had gone to the authorities completely off their own bat about one of their main men, then it would at least have provided pretty much incontrovertible evidence that there's no team sanctioned doping there. Short of Henao being innocent, that was about the best case scenario.