Convert queue message back into DI format
Queue messages use slightly different keys than in the rest of DonationInterface.
Normalize them so we can run do_transaction on the data.
This reverts a regression I introduced in 696861e5.
TODO
- Unit tests
Bug: T109527
Change-Id: I23e44114a5c8ae1d5ad9eeab4fe285de4b55bbc9