dsp: assetId is null on new transfer request

[ndr-brt]

Bug Report

Describe the Bug

When a new transfer is requested, the assetId set in the DataRequest is null, because that information is not set in the TransferRequestMessage.

See TransferProcessProtocolServiceImpl

Expected Behavior

The TransferProcessProtocolServiceImpl.requestedAction should get the agreement from the contractId and extract the assetId from there.

[ndr-brt]

EDIT: maybe it could be extracted from the contractId, that now contains the assetId as well
EDIT2: I confirm that the assetId can be extracted from the contractId

[jimmarino]

Yep, previously, I thought this was about the offerId but contracted we can do this.