EtherDelta wrapper tests do not work without on-chain order

EtherDelta works with on-chain orders and off-chain orders:

```
    if (!(
      (orders[user][hash] || ecrecover(sha3("\x19Ethereum Signed Message:\n32", hash),v,r,s) == user) &&
      block.number <= expires &&
      safeAdd(orderFills[user][hash], amount) <= amountGet
    )) throw;
```

The EtherDelta wrapper test only works for on-chain orders.