[noise] Test vector format update

[Trevor Perrin]

On Thu, Jun 15, 2017 at 5:05 PM, Jake McGinty <me at jake.su> wrote:
>
> It might be more flexible to use either
>
> { …
>   “protocol_name”: “Noise_XXpsk0+psk1_25519_AESGCM_SHA256”,
>   “init_psks”: [“hex string”, “hex string”]
> … }
>
> if you clarify what the order means, or
>
> { …
>   “protocol_name”: “Noise_XXpsk0+psk1_25519_AESGCM_SHA256”,
>   “init_psks”: [{ position: 0, key: “hex string” }, { position: 1, key: “hex string” }]
> … }

The list seems better, since we could have different modifiers in the
future which allow different PSK placements, but the order of psk
tokens will always be clear.

Trevor