Track Added times are not UTC

[benrr101]

The date/times that the server handles should all be UTC. We don't know where the clients will be accessing from. The clients are assuming that the dates coming out are UTC and applying the local date/time transform to it, which is doing duplicate transforms for east coast, but completely screwing it up for anyone anywhere else.

On DolomiteBackgroundProcessing/TrackOnboarding.cs:348 change DateTime.New to DateTime.UTCNow. While you're at it, make sure we use UTC everywhere else.