Minor Glitches Fix

ProfileProcess
- only logged in user's profile was being populated.

RetrieveRegistrationProcess
- totalDue was being pulled from database before registration was complete.

UpdateRegistrationProcess
- PeopleID was not being set in registrants (even though the registrantID and peopleID has always been the same value)
- Answers are not updated or deleted through the registration endpoint. However, previous registrant's answers were being set to null with each new registrant that was added. Answers should only be updated or deleted through the answers endpoint (this is currently how the front end is set up).

RegistrantService
- CreatedTimeStamp was not always being saved
Hmm.. the trouble I have with it is that it would deviate from the way the rest of the API is designed.  The web client is updating `Page`s and `Block`s through the `ConferenceResource.updateConference`.