Tx hash on token request response shows up as null

[dasanchez]

The response on a token request comes back as follows:

{"address": "cosmos15gtdpqxhkygyln69rcet30yasmhmm26rczpszf", "amount": "1000000stake", "chain": "faucet-testnet", "hash": null, "status": "success"}

The hash field should no show up as null.