Enable Bi-directional STREAM payments

[sappenin]

Currently in SendMoneyService, the "sender address" is computed to be a somewhat invalid value because Hermes doesn't have sufficient SPSP receiver details to compute this value using the shared-secret in the STREAM.

We should either add this functionality into Hermes, or defer this on grounds that Hermes functionality should be in the Connector, which will have the SPSP server information in the runtime.

For now, this is not an issue because Hermes isn't facilitating bidirectional streams ATM.

[sappenin]

Hermes doesn't currently have the ability to compute a return address because it doesn't have the shared-secret that an SPSP server would use to compute a valid ILP address.

Rather than adding this functionality to Hermes, instead we simply stop hermes from sending the SourceAddressFrame (enabled via the PR that fixes hyperledger-archives/quilt#445 in Quilt).

In the Connector, when we build DurableStreamSender, we can add this functionality because that Connector will have an SPSP server secret and will be able to construct ILP return addresses properly.