fixup! BOLT 4: remove old enctlvs test vectors, use onion-payment-sty…

…le one.

Val points out that Dave would create padding such that their *own* hops
are even: he doesn't know Alice's hop she'll prepend, so it's weird that
his padding matched that!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>