2144728 - Recruiting: Candidate cannot be moved in Pipeline

The issue is because a jobreq when is posted and open, customers/recruiting users are either changing the questions or fields and making them required to be answered at a certain stage in the
mid of the recruiting process, and for a candidate who has already applied to the opening before the changes the recruiter would not be able to move him to further status primarily because this
being a multistage application now there are certain fields or questions which are not answered by the candidate (which is a expected behavior of multistage feature).  Best practice is that the screening questions should be made read only after the req is approved so that no legal or compliance issues occur in screening candidates differently.