#62186262 Auditor can't see Request Title, Assignee and request type on imported requests

Per [story 62186262](https://www.pivotaltracker.com/story/show/62186262).  Imported requests are now added to audit context on import (at save).

Also make the due date and requested-on date required, and indicated on template, as it is not nullable.

No further change was required to get the other fields to appear correctly.