verificationexpecteddatum model and repo

Change-Id: I573a60a8b3b957af141c4e991a76ca8e3c23b2be
update get per review comments

Change-Id: Ifae93e87e975133e750997f2d08881097c756698
Merge pull request #382 from reaperhulk/verify-resource

VerificationExpectedDatum model and repo