Support preserving Claim/Check in uow returned from redeemClaimcheck

[CodeOnCoffee]

We have a use-case where we want to retrieve the claim/check in fromKinesis, but still have access to the raw claim entry to forward it along downstream. We implemented this in redeemClaimcheck by passing-in a retainClaim option which when true adds the claim to the uow under a 'claimCheck' property.

Please advise if you would like us to open a PR to add this functionality

claimcheck.js.txt